{"id":19275,"date":"2025-07-07T03:45:05","date_gmt":"2025-07-06T20:45:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=19275"},"modified":"2025-07-07T06:35:46","modified_gmt":"2025-07-06T23:35:46","slug":"kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/","title":{"rendered":"K\u00ednh l\u00fap l\u00e0 g\u00ec? \u0110\u1eb7c \u0111i\u1ec3m, c\u1ea5u t\u1ea1o, c\u00f4ng d\u1ee5ng v\u00e0 ph\u00e2n lo\u1ea1i chi ti\u1ebft"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Kinh_lup_la_gi\" >K\u00ednh l\u00fap l\u00e0 g\u00ec?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Dac_diem_cua_kinh_lup\" >\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a k\u00ednh l\u00fap<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Neu_cau_tao_cua_kinh_lup\" >N\u00eau c\u1ea5u t\u1ea1o c\u1ee7a k\u00ednh l\u00fap<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Cong_dung_cua_kinh_lup\" >C\u00f4ng d\u1ee5ng c\u1ee7a k\u00ednh l\u00fap<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Cach_su_dung_kinh_lup\" >C\u00e1ch s\u1eed d\u1ee5ng k\u00ednh l\u00fap\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Huong_dan_cach_quan_sat_vat_qua_kinh_lup\" >H\u01b0\u1edbng d\u1eabn c\u00e1ch quan s\u00e1t v\u1eadt qua k\u00ednh l\u00fap<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Qua_trinh_tao_anh_cua_kinh_lup\" >Qu\u00e1 tr\u00ecnh t\u1ea1o \u1ea3nh c\u1ee7a k\u00ednh l\u00fap<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Cac_loai_kinh_lup_thong_dung_hien_nay\" >C\u00e1c lo\u1ea1i k\u00ednh l\u00fap th\u00f4ng d\u1ee5ng hi\u1ec7n nay<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/kinh-lup-la-gi-dac-diem-cau-tao-cong-dung-va-phan-loai-chi-tiet\/#Bai_tap_ve_kinh_lup_vat_ly_lop_9\" >B\u00e0i t\u1eadp v\u1ec1 k\u00ednh l\u00fap v\u1eadt l\u00fd l\u1edbp 9\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p dir=\"ltr\">K\u00ednh l\u00fap l\u00e0 m\u1ed9t d\u1ee5ng c\u1ee5 kh\u00e1 ph\u1ed5 bi\u1ebfn v\u00e0 d\u1ec5 d\u00e0ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c trong c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m, th\u1ebf nh\u01b0ng kh\u00f4ng h\u1eb3n ai trong ch\u00fang ta c\u0169ng nh\u1edb r\u00f5 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o c\u0169ng nh\u01b0 c\u00f4ng d\u1ee5ng c\u1ee7a n\u00f3. Trong b\u00e0i vi\u1ebft n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd gi\u00fap c\u00e1c b\u1ea1n t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 kh\u00e1i ni\u1ec7m, c\u1ea5u t\u1ea1o, c\u00f4ng d\u1ee5ng v\u00e0 s\u1ef1 t\u1ea1o \u1ea3nh c\u1ee7a k\u00ednh l\u00fap chi ti\u1ebft nh\u1ea5t !<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                                Th\u00e0nh th\u1ea1o 2.000+ t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng anh<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng anh<br \/>\n                                                                                Gi\u1ecfi To\u00e1n &#8211; ti\u1ebfng Anh theo ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n EQ &amp; kh\u1ea3 n\u0103ng ti\u1ebfng Vi\u1ec7t<\/p>\n<p>                                                                                *B\u1ea1n ch\u01b0a ch\u1ecdn m\u1ee5c n\u00e0o!<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Kinh_lup_la_gi\"><\/span>K\u00ednh l\u00fap l\u00e0 g\u00ec?\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-1.jpg\" alt=\"K\u00ednh l\u00fap l\u00e0 g\u00ec? (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">K\u00ednh l\u00fap (trong ti\u1ebfng Ph\u00e1p g\u1ecdi l\u00e0 loupe) l\u00e0 m\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5, ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 khu\u1ebfch \u0111\u1ea1i h\u00ecnh \u1ea3nh. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, k\u00ednh l\u00fap l\u00e0 m\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 ng\u1eafn.<\/p>\n<p dir=\"ltr\">\u0110\u1ec3 d\u1ec5 d\u00e0ng hi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a k\u00ednh l\u00fap, ch\u00fang ta s\u1ebd nh\u1eafc l\u1ea1i v\u1ec1 kh\u00e1i ni\u1ec7m th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 v\u00e0 ti\u00eau c\u1ef1 nh\u00e9.\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">Th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5: \u0110\u00e2y l\u00e0 lo\u1ea1i th\u1ea5u k\u00ednh c\u00f3 m\u00e0u trong su\u1ed1t, ph\u1ea7n r\u00eca s\u1ebd m\u1ecfng h\u01a1n so v\u1edbi ph\u1ea7n trung t\u00e2m. Th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi hai m\u1eb7t c\u1ea7u. M\u1ed9t trong hai m\u1eb7t k\u00ednh c\u1ee7a th\u1ea5u k\u00ednh s\u1ebd ph\u1eb3ng v\u00e0 m\u1eb7t c\u00f2n l\u1ea1i l\u00e0 m\u1eb7t l\u1ed3i.\u00a0<\/li>\n<li dir=\"ltr\">Ti\u00eau c\u1ef1 c\u1ee7a th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5: Ch\u00ednh l\u00e0\u00a0kho\u1ea3ng c\u00e1ch t\u1eeb ti\u00eau \u0111i\u1ec3m F \u0111i t\u1edbi quang t\u00e2m O c\u1ee7a th\u1ea5u k\u00ednh v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 f.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dac_diem_cua_kinh_lup\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a k\u00ednh l\u00fap<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li dir=\"ltr\">Nh\u1eefng v\u1eadt nh\u1ecf khi qua k\u00ednh l\u00fap s\u1ebd cho ra \u1ea3nh \u1ea3o v\u00e0 l\u1edbn h\u01a1n v\u1eadt. \u1ea2o \u1ea3nh n\u00e0y m\u1eaft ta ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.\u00a0<\/li>\n<li dir=\"ltr\">Tr\u00ean m\u1ed7i k\u00ednh l\u00fap s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 b\u1ed9i gi\u00e1c ri\u00eang (G) v\u00e0 \u0111\u01b0\u1ee3c k\u00ed hi\u1ec7u b\u1eb1ng c\u00e1c con s\u1ed1 nh\u01b0 2x, 3x, 5x, 8x, 10x\u2026.\u00a0<\/li>\n<li dir=\"ltr\">C\u00e1c k\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c c\u00e0ng l\u1edbn th\u00ec cho ra \u1ea3nh c\u00e0ng l\u1edbn (ti\u00eau c\u1ef1 c\u00e0ng ng\u1eafn).\u00a0<\/li>\n<li dir=\"ltr\">N\u00f3 s\u1ebd cho bi\u1ebft \u1ea3nh m\u00e0 m\u1eaft ch\u00fang ta thu \u0111\u01b0\u1ee3c qua k\u00ednh l\u00fap l\u1edbn h\u01a1n bao nhi\u00eau l\u1ea7n so v\u1edbi \u1ea3nh m\u00e0 m\u1eaft ta thu \u0111\u01b0\u1ee3c khi quan s\u00e1t tr\u1ef1c ti\u1ebfp.<\/li>\n<li dir=\"ltr\">\u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c s\u1ed1 b\u1ed9i gi\u00e1c v\u00e0 ti\u00eau c\u1ef1 f c\u1ee7a k\u00ednh l\u00fap ta s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c: G = 25\/f<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Neu_cau_tao_cua_kinh_lup\"><\/span>N\u00eau c\u1ea5u t\u1ea1o c\u1ee7a k\u00ednh l\u00fap<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-2.jpg\" alt=\"C\u1ea5u t\u1ea1o c\u1ee7a k\u00ednh l\u00fap. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u1ea5u t\u1ea1o c\u1ee7a k\u00ednh l\u00fap g\u1ed3m:<\/p>\n<ul>\n<li dir=\"ltr\">N\u00f3 c\u00f3 c\u1ea5u t\u1ea1o l\u00e0 m\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5, c\u00f3 khung b\u1ea3o v\u1ec7 b\u00ean ngo\u00e0i v\u00e0 c\u00f3 ph\u1ea7n tay c\u1ea7m hay ph\u1ea7n ch\u00e2n \u0111\u1ebf, \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 khu\u1ebfch \u0111\u1ea1i h\u00ecnh \u1ea3nh.\u00a0<\/li>\n<li dir=\"ltr\">\u0110\u01b0\u1eddng k\u00ednh th\u00f4ng th\u01b0\u1eddng c\u1ee7a k\u00ednh l\u00fap th\u01b0\u1eddng l\u00e0 t\u1eeb v\u00e0i cm \u0111\u1ebfn v\u00e0i ch\u1ee5c cm.\u00a0<\/li>\n<li dir=\"ltr\">Khung b\u1ea3o v\u1ec7 c\u1ee7a k\u00ednh l\u00fap \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb nhi\u1ec1u lo\u1ea1i ch\u1ea5t li\u1ec7u kh\u00e1c nhau.\u00a0<\/li>\n<li dir=\"ltr\">\u0110\u1ed1i v\u1edbi ph\u1ea7n tay c\u1ea7m hay ch\u00e2n \u0111\u1ebf s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong t\u1eebng tr\u01b0\u1eddng h\u1ee3p.\u00a0<\/li>\n<\/ul>\n<p dir=\"ltr\">Ch\u1eb3ng h\u1ea1n, \u0111\u1ec3 s\u1eed d\u1ee5ng v\u1edbi m\u1ee5c \u0111\u00edch ki\u1ec3m tra nh\u1eefng chi ti\u1ebft kh\u00f4ng qu\u00e1 ph\u1ee9c t\u1ea1p th\u00ec k\u00ednh l\u00fap s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m nh\u1ecf g\u1ecdn, \u0111\u01a1n gi\u1ea3n b\u1eb1ng tay c\u1ea7m.\u00a0 Ng\u01b0\u1ee3c l\u1ea1i, v\u1edbi nh\u1eefng chi ti\u1ebft c\u1ea7u k\u1ef3 h\u01a1n, ch\u00fang ta c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng nh\u1eefng lo\u1ea1i k\u00ednh \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng th\u00f4ng s\u1ed1 ph\u1ee9c t\u1ea1p.\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_dung_cua_kinh_lup\"><\/span>C\u00f4ng d\u1ee5ng c\u1ee7a k\u00ednh l\u00fap<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/cong-dung-cua-kinh-lup.jpg\" alt=\"C\u00f4ng d\u1ee5ng c\u1ee7a k\u00ednh l\u00fap. (\u1ea2nh: Canva.com)\" width=\"100%\">\u00a0<\/p>\n<p dir=\"ltr\">Ng\u00e0y nay c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i k\u00ednh l\u00fap kh\u00e1c nhau \u0111\u1ec3 s\u1eed d\u1ee5ng \u1edf nh\u1eefng t\u00ecnh hu\u1ed1ng ph\u00f9 h\u1ee3p. Ch\u00ednh v\u00ec v\u1eady m\u00e0 c\u00f4ng d\u1ee5ng c\u1ee7a ch\u00fang c\u0169ng ng\u00e0y c\u00e0ng \u0111a d\u1ea1ng h\u01a1n.\u00a0<\/p>\n<p dir=\"ltr\">M\u1ed9t s\u1ed1 c\u00f4ng d\u1ee5ng ch\u00ednh c\u1ee7a k\u00ednh l\u00fap c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn nh\u01b0 d\u00f9ng \u0111\u1ec3 quan s\u00e1t c\u00e1c v\u1eadt, \u0111\u1ecdc ch\u1eef c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf hay \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c \u0111i\u1ec1u tra nh\u1eefng d\u1ea5u v\u1ebft nh\u1ecf c\u1ee7a t\u1ed9i ph\u1ea1m trong ng\u00e0nh c\u00f4ng an,&#8230;<\/p>\n<p dir=\"ltr\">Ngo\u00e0i c\u00e1c c\u00f4ng d\u1ee5ng ch\u00ednh tr\u00ean, k\u00ednh l\u00fap c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau nh\u01b0:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eeda ch\u1eefa c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3, m\u00e1y \u1ea3nh<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ki\u1ec3m tra c\u1ea5u tr\u00fac s\u1ee3i v\u1ea3i trong ng\u00e0nh d\u1ec7t may<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eed d\u1ee5ng trong ng\u00e0nh kh\u1ea3o c\u1ed5 h\u1ecdc, d\u00f9ng \u0111\u1ec3 nghi\u00ean c\u1ee9u c\u00e1c lo\u1ea1i \u0111\u1ed3 c\u1ed5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D\u00f9ng \u0111\u1ec3 ki\u1ec3m tra chi ti\u1ebft s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng trong ng\u00e0nh c\u01a1 kh\u00ed nh\u01b0 \u0111ai \u1ed1c,\u2026<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eed d\u1ee5ng trong l\u0129nh v\u1ef1c s\u1eeda ch\u1eefa linh ki\u1ec7n \u0111i\u1ec7n t\u1eed, ki\u1ec3m tra c\u00e1c bo m\u1ea1ch \u0111i\u1ec7n t\u1eed,&#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eed d\u1ee5ng trong l\u0129nh v\u1ef1c y t\u1ebf, l\u00e0m \u0111\u1eb9p, nha khoa,&#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u00e1 qu\u00fd trong nh\u1eefng ti\u1ec7m trang s\u1ee9c,&#8230;<\/p>\n<\/li>\n<\/ul>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">C\u01a0 H\u1ed8I H\u1eccC TO\u00c1N T\u01af DUY + TI\u1ebeNG ANH V\u1edaI CHI PH\u00cd CH\u01afA \u0110\u1ebeN 2K\/NG\u00c0Y CHO TR\u1eba M\u1ea6M NON V\u00c0 TI\u1ec2U H\u1eccC C\u00d9NG MONKEY MATH KH\u00d4NG TH\u1ec2 B\u1ece L\u1ee0.<\/p>\n<p style=\"text-align: center\">\u00a0<\/p>\n<p><img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/button_dang-ky-ngay-1.png\" alt=\"\" width=\"185\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_su_dung_kinh_lup\"><\/span>C\u00e1ch s\u1eed d\u1ee5ng k\u00ednh l\u00fap\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Ti\u1ebfp \u0111\u1ebfn ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1ch quan s\u00e1t tr\u00ean k\u00ednh l\u00fap, \u0111i\u1ec1u t\u01b0\u1edfng ch\u1eebng h\u1ea7u h\u1ebft ai c\u0169ng \u0111\u00e3 bi\u1ebft nh\u01b0ng th\u1ef1c t\u1ebf kh\u00f4ng ph\u1ea3i ai c\u0169ng c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c.<\/p>\n<p dir=\"ltr\">Nh\u01b0 \u0111\u00e3 gi\u1ea3i th\u00edch \u1edf kh\u00e1i ni\u1ec7m, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a k\u00ednh l\u00fap ch\u00ednh l\u00e0 t\u1ea1o ra \u1ea3o \u1ea3nh \u1edf ph\u00eda sau k\u00ednh, c\u00f9ng ph\u00eda v\u1edbi v\u1eadt th\u1ec3 quan s\u00e1t.\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Huong_dan_cach_quan_sat_vat_qua_kinh_lup\"><\/span>H\u01b0\u1edbng d\u1eabn c\u00e1ch quan s\u00e1t v\u1eadt qua k\u00ednh l\u00fap<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Th\u00f4ng th\u01b0\u1eddng, ch\u00fang ta s\u1ebd \u0111\u1eb7t k\u00ednh g\u1ea7n v\u1edbi v\u1eadt th\u1ec3 sao cho kho\u1ea3ng c\u00e1ch gi\u1eefa v\u1eadt v\u1edbi k\u00ednh nh\u1ecf h\u01a1n ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh \u0111\u1ec3 c\u00f3 th\u1ec3 quan s\u00e1t m\u1ed9t c\u00e1ch t\u1ed1t nh\u1ea5t.\u00a0<\/p>\n<p dir=\"ltr\"><em>* T\u00ecm hi\u1ec3u th\u00eam \u0111\u1ec3 hi\u1ec3u r\u00f5 \u0111\u01b0\u1ee3c nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a k\u00ednh l\u00fap:<\/em><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec3m n\u1eb1m ch\u00ednh gi\u1eefa th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5, \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh c\u1ee7a th\u1ea5u k\u00ednh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 quang t\u00e2m.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u01a1i \u00e1nh s\u00e1ng t\u1eeb v\u1eadt \u0111i qua k\u00ednh v\u00e0 h\u1ed9i t\u1ee5 l\u1ea1i g\u1ecdi l\u00e0 ti\u00eau \u0111i\u1ec3m.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kho\u1ea3ng c\u00e1ch t\u1eeb quang t\u00e2m \u0111\u1ebfn ti\u00eau \u0111i\u1ec3m g\u1ecdi l\u00e0 ti\u00eau c\u1ef1.<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Qua_trinh_tao_anh_cua_kinh_lup\"><\/span>Qu\u00e1 tr\u00ecnh t\u1ea1o \u1ea3nh c\u1ee7a k\u00ednh l\u00fap<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi m\u1ed9t h\u00ecnh \u1ea3nh c\u1ee7a v\u1eadt \u0111i qua k\u00ednh l\u00fap, ti\u00eau \u0111i\u1ec3m c\u1ee7a th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 s\u1ebd l\u00e0 n\u01a1i h\u1ed9i t\u1ee5 c\u1ee7a c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng, sau \u0111\u00f3 truy\u1ec1n t\u1edbi m\u1eaft ch\u00fang ta nh\u01b0ng \u0111\u00f3 th\u1ef1c ch\u1ea5t kh\u00f4ng ph\u1ea3i l\u00e0 h\u00ecnh \u1ea3nh th\u1eadt c\u1ee7a v\u1eadt m\u00e0 ch\u1ec9 l\u00e0 \u1ea3nh \u1ea3o.\u00a0<\/p>\n<p dir=\"ltr\">\u1ea2o \u1ea3nh s\u1ebd \u0111\u01b0\u1ee3c h\u1ee9ng l\u1ea1i trong kho\u1ea3ng ti\u00eau c\u1ef1 tr\u01b0\u1edbc m\u1eaft \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c.<\/p>\n<p dir=\"ltr\">V\u1eady n\u00ean, khi quan s\u00e1t v\u1eadt qua k\u00ednh l\u00fap, m\u1ecdi ng\u01b0\u1eddi ph\u1ea3i \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng ti\u00eau c\u1ef1 nh\u1ea5t \u0111\u1ecbnh c\u1ee7a th\u1ea5u k\u00ednh, sao cho thu \u0111\u01b0\u1ee3c \u1ea3nh \u1ea3o l\u1edbn h\u01a1n v\u1eadt, c\u0169ng nh\u01b0 m\u1eaft nh\u00ecn th\u1ea5y \u1ea3nh \u1ea3o s\u1ebd c\u00f9ng chi\u1ec1u v\u00e0 l\u1edbn h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-3.jpg\" alt=\"Qu\u00e1 tr\u00ecnh t\u1ea1o \u1ea3nh c\u1ee7a k\u00ednh l\u00fap. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_kinh_lup_thong_dung_hien_nay\"><\/span>C\u00e1c lo\u1ea1i k\u00ednh l\u00fap th\u00f4ng d\u1ee5ng hi\u1ec7n nay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">K\u00ednh l\u00fap c\u00f3 tay c\u1ea7m l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay. Ngo\u00e0i ra, k\u00ednh l\u00fap c\u00f2n c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, ph\u00f9 h\u1ee3p cho t\u1eebng nhu c\u1ea7u c\u1ee7a m\u1ed7i ng\u01b0\u1eddi.<\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap c\u1ea7m tay (kh\u00f4ng c\u00f3 \u0111\u00e8n ho\u1eb7c c\u00f3 \u0111\u00e8n): \u0111\u00e2y l\u00e0 lo\u1ea1i k\u00ednh l\u00fap \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t b\u1edfi k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, d\u1ec5 d\u00e0ng mang theo b\u00ean m\u00ecnh.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-4.jpg\" alt=\"K\u00ednh l\u00fap c\u1ea7m tay. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap \u0111\u1ed9i \u0111\u1ea7u: k\u00ednh l\u00fap \u0111\u1ed9i \u0111\u1ea7u th\u01b0\u1eddng k\u1ebf khi ng\u01b0\u1eddi s\u1eed d\u1ee5ng kh\u00f4ng ti\u1ec7n c\u1ea7m tay.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-5.jpg\" alt=\"K\u00ednh l\u00fap \u0111\u1ed9i \u0111\u1ea7u. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap \u0111eo m\u1eaft c\u00f3 \u0111\u00e8n: th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u1ea1ng 1 m\u1eaft v\u00e0 2 m\u1eaft, m\u1eaft k\u00ednh gi\u00fap ng\u01b0\u1eddi s\u1eed d\u1ee5ng t\u00f9y ch\u1ec9nh m\u1ee9c \u0111\u1ed9 ph\u00f3ng \u0111\u1ea1i theo mong mu\u1ed1n.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-6.jpg\" alt=\"K\u00ednh l\u00fap \u0111eo m\u1eaft c\u00f3 \u0111\u00e8n. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap \u0111\u1ecdc s\u00e1ch b\u00e1o, ch\u1eef nh\u1ecf: th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 gi\u00fap ng\u01b0\u1eddi l\u1edbn tu\u1ed5i c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c s\u00e1ch b\u00e1o.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-7.jpg\" alt=\"K\u00ednh l\u00fap \u0111\u1ecdc s\u00e1ch b\u00e1o. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap s\u1eeda ch\u1eefa c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-8.jpg\" alt=\"K\u00ednh l\u00fap s\u1eeda ch\u1eefa. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap soi v\u1ea3i d\u00f9ng trong ng\u00e0nh may:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-9.jpg\" alt=\"K\u00ednh l\u00fap soi v\u1ea3i. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap soi trang s\u1ee9c, \u0111\u00e1 qu\u00fd<img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-10.jpg\" alt=\"K\u00ednh l\u00fap soi trang s\u1ee9c, kim c\u01b0\u01a1ng. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\" role=\"presentation\">K\u00ednh l\u00fap \u0111\u1ec3 b\u00e0n, k\u1eb9p b\u00e0n:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-11.jpg\" alt=\"K\u00ednh l\u00fap \u0111\u1ec3 b\u00e0n. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_ve_kinh_lup_vat_ly_lop_9\"><\/span>B\u00e0i t\u1eadp v\u1ec1 k\u00ednh l\u00fap v\u1eadt l\u00fd l\u1edbp 9\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>V\u1ec1 n\u1ed9i dung ki\u1ebfn th\u1ee9c v\u1ec1 k\u00ednh l\u00fap, ch\u00fang ta s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc v\u00e0 l\u00e0m quen t\u1eeb ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc m\u00f4n V\u1eadt L\u00fd 9. V\u1eady n\u00ean, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ec3 c\u00e1c em c\u00f9ng nhau luy\u1ec7n t\u1eadp:<\/p>\n<p dir=\"ltr\">B\u00e0i 1: Tr\u00ean gi\u00e1 \u0111\u1ee1 c\u1ee7a m\u1ed9t th\u1ea5u k\u00ednh c\u00f3 ghi 2,5x. \u0110\u00f3 l\u00e0:<\/p>\n<p dir=\"ltr\">A. M\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 2,5 cm.<\/p>\n<p dir=\"ltr\">B. M\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec c\u00f3 ti\u00eau c\u1ef1 2,5 cm.<\/p>\n<p dir=\"ltr\">C. M\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 10 cm.<\/p>\n<p dir=\"ltr\">D. M\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec c\u00f3 ti\u00eau c\u1ef1 10 cm.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Ch\u1ecdn C<\/p>\n<p dir=\"ltr\">B\u00e0i 2: C\u00f3 th\u1ec3 d\u00f9ng k\u00ednh l\u00fap \u0111\u1ec3 quan s\u00e1t:<\/p>\n<p dir=\"ltr\">A. M\u1ed9t ng\u00f4i sao.<\/p>\n<p dir=\"ltr\">B. Qu\u1ea3 b\u00f3ng \u0111\u00e1.<\/p>\n<p dir=\"ltr\">C. M\u1ed9t con ki\u1ebfn.<\/p>\n<p dir=\"ltr\">D. C\u00e1c nguy\u00ean t\u1eed.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Ch\u1ecdn C<\/p>\n<p dir=\"ltr\">B\u00e0i 3: Th\u1ea5u k\u00ednh n\u00e0o d\u01b0\u1edbi \u0111\u00e2y c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m k\u00ednh l\u00fap?<\/p>\n<p dir=\"ltr\">A. Th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 10 cm.<\/p>\n<p dir=\"ltr\">B. Th\u1ea5u k\u00ednh ph\u00e2n k\u00ec c\u00f3 ti\u00eau c\u1ef1 10 cm.<\/p>\n<p dir=\"ltr\">C. Th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 20 cm.<\/p>\n<p dir=\"ltr\">D. Th\u1ea5u k\u00ednh ph\u00e2n k\u00ec c\u00f3 ti\u00eau c\u1ef1 20 cm.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Ch\u1ecdn A<\/p>\n<p dir=\"ltr\">B\u00e0i 4: K\u00ednh l\u00fap l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3:<\/p>\n<p dir=\"ltr\">A. ti\u00eau c\u1ef1 d\u00e0i d\u00f9ng \u0111\u1ec3 quan s\u00e1t c\u00e1c v\u1eadt nh\u1ecf.<\/p>\n<p dir=\"ltr\">B. ti\u00eau c\u1ef1 d\u00e0i d\u00f9ng \u0111\u1ec3 quan s\u00e1t c\u00e1c v\u1eadt c\u00f3 h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p.<\/p>\n<p dir=\"ltr\">C. ti\u00eau c\u1ef1 ng\u1eafn d\u00f9ng \u0111\u1ec3 quan s\u00e1t c\u00e1c v\u1eadt nh\u1ecf.<\/p>\n<p dir=\"ltr\">D. ti\u00eau c\u1ef1 ng\u1eafn d\u00f9ng \u0111\u1ec3 quan s\u00e1t c\u00e1c v\u1eadt l\u1edbn.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: C<\/p>\n<p dir=\"ltr\">B\u00e0i 5: C\u00f3 th\u1ec3 d\u00f9ng k\u00ednh l\u00fap \u0111\u1ec3 quan s\u00e1t:<\/p>\n<p dir=\"ltr\">A. tr\u1eadn b\u00f3ng \u0111\u00e1 tr\u00ean s\u00e2n v\u1eadn \u0111\u1ed9ng.<\/p>\n<p dir=\"ltr\">B. m\u1ed9t con vi tr\u00f9ng.<\/p>\n<p dir=\"ltr\">C. c\u00e1c chi ti\u1ebft m\u00e1y c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111eo tay.<\/p>\n<p dir=\"ltr\">D. k\u00edch th\u01b0\u1edbc c\u1ee7a nguy\u00ean t\u1eed.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: C<\/p>\n<p dir=\"ltr\">B\u00e0i 6: M\u1ed9t ng\u01b0\u1eddi quan s\u00e1t m\u1ed9t v\u1eadt nh\u1ecf b\u1eb1ng k\u00ednh l\u00fap, ng\u01b0\u1eddi \u1ea5y ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3:<\/p>\n<p dir=\"ltr\">A. \u1ea3nh c\u1ee7a v\u1eadt l\u00e0 \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u, l\u1edbn h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\">B. \u1ea3nh c\u1ee7a v\u1eadt l\u00e0 \u1ea3nh th\u1eadt, c\u00f9ng chi\u1ec1u, l\u1edbn h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\">C. \u1ea3nh c\u1ee7a v\u1eadt l\u00e0 \u1ea3nh \u1ea3o, ng\u01b0\u1ee3c chi\u1ec1u, l\u1edbn h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\">D. \u1ea3nh c\u1ee7a v\u1eadt l\u00e0 \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u, nh\u1ecf h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: A<\/p>\n<p dir=\"ltr\">B\u00e0i 6: Trong c\u00e1c k\u00ednh l\u00fap sau, k\u00ednh l\u00fap n\u00e0o khi d\u00f9ng \u0111\u1ec3 quan s\u00e1t m\u1ed9t v\u1eadt s\u1ebd cho \u1ea3nh l\u1edbn nh\u1ea5t?<\/p>\n<p dir=\"ltr\">A. K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c G = 5.<\/p>\n<p dir=\"ltr\">B. K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c G = 5,5.<\/p>\n<p dir=\"ltr\">C. K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c G = 4.<\/p>\n<p dir=\"ltr\">D. K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c G = 6.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: D<\/p>\n<p dir=\"ltr\">B\u00e0i 7: S\u1ed1 b\u1ed9i gi\u00e1c v\u00e0 ti\u00eau c\u1ef1 (\u0111o b\u1eb1ng \u0111\u01a1n v\u1ecb xentimet) c\u1ee7a m\u1ed9t k\u00ednh l\u00fap c\u00f3 h\u1ec7 th\u1ee9c:<\/p>\n<p dir=\"ltr\">A. G = 25f<\/p>\n<p dir=\"ltr\">B. G = f\/25<\/p>\n<p dir=\"ltr\">C. G = 25\/f<\/p>\n<p dir=\"ltr\">D. G = 25 \u2013 f<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: C<\/p>\n<p dir=\"ltr\">B\u00e0i 8: S\u1ed1 ghi tr\u00ean v\u00e0nh c\u1ee7a m\u1ed9t k\u00ednh l\u00fap l\u00e0 5x. Ti\u00eau c\u1ef1 k\u00ednh l\u00fap c\u00f3 gi\u00e1 tr\u1ecb l\u00e0:<\/p>\n<p dir=\"ltr\">A. f = 5m<\/p>\n<p dir=\"ltr\">B. f = 5cm<\/p>\n<p dir=\"ltr\">C. f = 5mm<\/p>\n<p dir=\"ltr\">D. f = 5dm<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: B<\/p>\n<p dir=\"ltr\">B\u00e0i 9: Khi quan s\u00e1t m\u1ed9t v\u1eadt b\u1eb1ng k\u00ednh l\u00fap, \u0111\u1ec3 m\u1eaft nh\u00ecn th\u1ea5y m\u1ed9t \u1ea3nh \u1ea3o l\u1edbn h\u01a1n v\u1eadt ta c\u1ea7n ph\u1ea3i:<\/p>\n<p dir=\"ltr\">A. \u0111\u1eb7t v\u1eadt ngo\u00e0i kho\u1ea3ng ti\u00eau c\u1ef1.<\/p>\n<p dir=\"ltr\">B. \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng ti\u00eau c\u1ef1.<\/p>\n<p dir=\"ltr\">C. \u0111\u1eb7t v\u1eadt s\u00e1t v\u00e0o m\u1eb7t k\u00ednh.<\/p>\n<p dir=\"ltr\">D. \u0111\u1eb7t v\u1eadt b\u1ea5t c\u1ee9 v\u1ecb tr\u00ed n\u00e0o.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: B<\/p>\n<p dir=\"ltr\">B\u00e0i 10: S\u1ed1 b\u1ed9i gi\u00e1c c\u1ee7a k\u00ednh l\u00fap cho bi\u1ebft g\u00ec?<\/p>\n<p dir=\"ltr\">A. \u0110\u1ed9 l\u1edbn c\u1ee7a \u1ea3nh.<\/p>\n<p>B. \u0110\u1ed9 l\u1edbn c\u1ee7a v\u1eadt.<\/p>\n<p>C. V\u1ecb tr\u00ed c\u1ee7a v\u1eadt.<\/p>\n<p>D. \u0110\u1ed9 ph\u00f3ng \u0111\u1ea1i c\u1ee7a k\u00ednh.<\/p>\n<p>\u0110\u00e1p \u00e1n: D<\/p>\n<p dir=\"ltr\">B\u00e0i 11: Khi quan s\u00e1t m\u1ed9t v\u1eadt nh\u1ecf qua k\u00ednh l\u00fap, ta nh\u00ecn th\u1ea5y \u1ea3nh c\u1ee7a v\u1eadt hay nh\u00ecn tr\u1ef1c ti\u1ebfp th\u1ea5y v\u1eadt? C\u00f3 th\u1ec3 l\u00e0m th\u00ed nghi\u1ec7m \u0111\u01a1n gi\u1ea3n n\u00e0o \u0111\u1ec3 \u0111\u1ec3 ch\u1ee9ng minh c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00f3 kh\u00f4ng?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Khi quan s\u00e1t m\u1ed9t v\u1eadt nh\u1ecf qua k\u00ednh l\u00fap, ta nh\u00ecn th\u1ea5y \u1ea3nh c\u1ee7a v\u1eadt.<\/p>\n<p dir=\"ltr\">\u0110\u1ec3 ki\u1ec3m tra, c\u00f3 th\u1ec3 d\u00f9ng k\u00ednh \u0111\u1ec3 quan s\u00e1t m\u1ed9t ph\u1ea7n chi\u1ebfc b\u00fat ch\u00ec, ph\u1ea7n c\u00f2n l\u1ea1i n\u1eb1m ngo\u00e0i k\u00ednh. Khi \u0111\u00f3 ph\u1ea7n nh\u00ecn qua k\u00ednh l\u1edbn h\u01a1n, c\u00f2n ph\u1ea7n n\u1eb1m ngo\u00e0i k\u00ednh th\u00ec nh\u1ecf h\u01a1n. =&gt; \u0111pcm.<\/p>\n<p dir=\"ltr\">B\u00e0i 12: K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c c\u00e0ng l\u1edbn th\u00ec c\u00f3 ti\u00eau c\u1ef1 c\u00e0ng d\u00e0i hay ng\u1eafn?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: S\u1ed1 b\u1ed9i gi\u00e1c c\u1ee7a k\u00ednh l\u00fap \u0111\u01b0\u1ee3c t\u00ednh b\u1edfi c\u00f4ng th\u1ee9c:<\/p>\n<p dir=\"ltr\">G = 25\/f (f \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng \u0111\u01a1n v\u1ecb cm)<\/p>\n<p dir=\"ltr\">\u21d2 K\u00ednh l\u00fap c\u00f3 s\u1ed1 b\u1ed9i gi\u00e1c c\u00e0ng l\u1edbn th\u00ec ti\u00eau c\u1ef1 c\u00e0ng ng\u1eafn.<\/p>\n<p dir=\"ltr\">B\u00e0i 13: S\u1ed1 b\u1ed9i gi\u00e1c nh\u1ecf nh\u1ea5t c\u1ee7a k\u00ednh l\u00fap l\u00e0 1,5x. V\u1eady ti\u00eau c\u1ef1 d\u00e0i nh\u1ea5t c\u1ee7a k\u00ednh l\u00fap s\u1ebd l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: T\u1eeb c\u00f4ng th\u1ee9c t\u00ednh s\u1ed1 b\u1ed9i gi\u00e1c c\u1ee7a k\u00ednh l\u00fap, ta c\u00f3 ti\u00eau c\u1ef1 d\u00e0i nh\u1ea5t c\u1ee7a k\u00ednh l\u00fap l\u00e0:<\/p>\n<p dir=\"ltr\">G = 25\/f = 25\/1,5 \u2248 16,7 (cm)<\/p>\n<p dir=\"ltr\">B\u00e0i 14: M\u1ed9t v\u1eadt nh\u1ecf qua k\u00ednh s\u1ebd c\u00f3 \u1ea3nh th\u1eadt hay \u1ea3nh \u1ea3o? To hay nh\u1ecf h\u01a1n v\u1eadt?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:\u00a0 M\u1ed9t v\u1eadt nh\u1ecf qua k\u00ednh l\u00fap s\u1ebd c\u00f3 \u1ea3nh \u1ea3o, to h\u01a1n v\u1eadt.<\/p>\n<p dir=\"ltr\">B\u00e0i 15: Mu\u1ed1n c\u00f3 \u1ea3nh nh\u01b0 \u1edf b\u00e0i 7, ta ph\u1ea3i \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng c\u00e1ch n\u00e0o tr\u01b0\u1edbc k\u00ednh?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Mu\u1ed1n c\u00f3 \u1ea3nh nh\u01b0 \u1edf c\u00e2u C3 th\u00ec ph\u1ea3i \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh l\u00fap (c\u00e1ch k\u00ednh l\u00fap m\u1ed9t kho\u1ea3ng nh\u1ecf h\u01a1n hay b\u1eb1ng ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh).<\/p>\n<p dir=\"ltr\">B\u00e0i 16: H\u00e3y k\u1ec3 m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p trong th\u1ef1c t\u1ebf \u0111\u1eddi s\u1ed1ng v\u00e0 s\u1ea3n xu\u1ea5t ph\u1ea3i s\u1eed d\u1ee5ng \u0111\u1ebfn k\u00ednh l\u00fap.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: Nh\u1eefng tr\u01b0\u1eddng s\u1eed d\u1ee5ng k\u00ednh l\u00fap l\u00e0:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ecdc nh\u1eefng ch\u1eef vi\u1ebft nh\u1ecf.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Quan s\u00e1t nh\u1eefng chi ti\u1ebft nh\u1ecf c\u1ee7a m\u1ed9t s\u1ed1 con v\u1eadt hay th\u1ef1c v\u1eadt (nh\u01b0 c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a con ki\u1ebfn, con mu\u1ed7i, con ong, c\u00e1c v\u00e2n tr\u00ean l\u00e1 c\u00e2y,\u2026).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Quan s\u00e1t nh\u1eefng chi ti\u1ebft nh\u1ecf c\u1ee7a m\u1ed9t \u0111\u1ed3 v\u1eadt (v\u00ed d\u1ee5 nh\u01b0 c\u00e1c chi ti\u1ebft trong \u0111\u1ed3ng h\u1ed3, trong m\u1ea1ch \u0111i\u1ec7n t\u1eed c\u1ee7a tivi, m\u00e1y thu thanh,\u2026).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">B\u00e0i 17: Cho m\u1ed9t h\u1ec7 g\u1ed3m 2 k\u00ednh l\u00fap c\u00f3 \u0111\u1ed9 b\u1ed9i gi\u00e1c l\u1ea7n l\u01b0\u1ee3t l\u00e0 G1 = 2x, G2 = 5x. \u0110\u1eb7t 2 k\u00ednh l\u00fap tr\u00ean s\u00e1t nhau, v\u1edbi k\u00ednh l\u00fap G2 s\u1ebd t\u1ea1o \u1ea3nh t\u1eeb v\u1eadt tr\u01b0\u1edbc. \u0110\u1eb7t m\u1ed9t v\u1eadt c\u00f3 k\u00edch th\u01b0\u1edbc 1 mm tr\u01b0\u1edbc h\u1ec7 th\u1ea5u k\u00ednh r\u1ed3i quan s\u00e1t th\u00ec ta th\u1ea5y \u1ea3nh thu \u0111\u01b0\u1ee3c qua h\u1ec7 th\u1ea5u k\u00ednh c\u00f3 k\u00edch th\u01b0\u1edbc 1,5 cm. T\u00ecm kho\u1ea3ng c\u00e1ch ban \u0111\u1ea7u gi\u1eefa v\u1eadt v\u00e0 h\u1ec7 th\u1ea5u k\u00ednh.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1eb7t \u1ea9n l\u00e0 h\u1ec7 s\u1ed1 ph\u00f3ng \u0111\u1ea1i k c\u1ee7a k\u00ednh l\u00fap G2 v\u00e0 kho\u1ea3ng c\u00e1ch d t\u1eeb v\u1eadt \u0111\u1ebfn h\u1ec7 th\u1ea5u k\u00ednh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ea5u k\u00ednh cho G2, t\u00ecm m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa d v\u00e0 k.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ea5u k\u00ednh cho G1 \u0111\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c d v\u00e0 k =&gt; \u0111\u00e1p \u00e1n c\u1ea7n t\u00ecm.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/kinh-lup-12.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">=&gt; d = 103 cm<\/p>\n<p dir=\"ltr\">B\u00e0i 18: Tr\u00ean v\u00e0nh c\u1ee7a m\u1ed9t chi\u1ebfc k\u00ednh l\u00fap c\u00f3 ghi G = 5x. V\u1eadt nh\u1ecf S c\u00f3 chi\u1ec1u cao l\u00e0 0,4cm \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u01b0\u1edbc k\u00ednh l\u00fap v\u00e0 c\u00e1ch k\u00ednh l\u00fap 3cm. \u1ea2nh c\u1ee7a S qua k\u00ednh l\u00fap c\u00e1ch S bao nhi\u00eau xen ti m\u00e9t?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<p dir=\"ltr\">Ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh l\u00fap l\u00e0:<\/p>\n<p dir=\"ltr\">G = 25\/f =&gt; f = 25\/G= 25\/5 = 5cm<\/p>\n<p dir=\"ltr\">V\u00ec d &lt; f n\u00ean \u1ea3nh n\u00e0y l\u00e0 \u1ea3nh \u1ea3o, n\u1eb1m c\u00f9ng ph\u00eda v\u1edbi v\u1eadt so v\u1edbi k\u00ednh l\u00fap<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 v\u1edbi \u1ea3nh \u1ea3o<\/p>\n<p dir=\"ltr\">1\/f = 1\/d \u2212 1\/d\u2032 =&gt; 1\/d\u2032 = 1\/d \u2212 1\/f = 13 \u2212 15 = 2\/15<\/p>\n<p dir=\"ltr\">=&gt; d&#8217; = 7,5 cm<\/p>\n<p dir=\"ltr\">=&gt; Kho\u1ea3ng c\u00e1ch t\u1eeb \u1ea3nh \u0111\u1ebfn v\u1eadt l\u00e0: 7,5 \u2013 3 = 4,5 (cm)<\/p>\n<p dir=\"ltr\">B\u00e0i 19: M\u1ed9t ng\u01b0\u1eddi c\u00f3 \u0111i\u1ec3m c\u1ef1c c\u1eadn c\u00e1ch m\u1eaft 25cm. Ng\u01b0\u1eddi n\u00e0y quan s\u00e1t m\u1ed9t v\u1eadt nh\u1ecf qua k\u00ednh l\u00fap c\u00f3 \u0111\u1ed9 b\u1ed9i gi\u00e1c G = 5x. M\u1eaft \u0111\u1eb7t c\u00e1ch k\u00ednh 10cm. Ph\u1ea3i \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng n\u00e0o tr\u01b0\u1edbc k\u00ednh \u0111\u1ec3 ng\u01b0\u1eddi n\u00e0y c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c v\u1eadt \u0111\u00fang c\u00e1ch?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:\u00a0<\/p>\n<p dir=\"ltr\">Ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh l\u00fap l\u00e0:<\/p>\n<p dir=\"ltr\">G = 25\/f =&gt; f= 25\/G = 25\/5 = 5cm<\/p>\n<p dir=\"ltr\">K\u00ednh l\u00fap l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5. Ng\u01b0\u1eddi n\u00e0y quan s\u00e1t b\u1eb1ng k\u00ednh l\u00fap \u0111\u00fang c\u00e1ch t\u1ee9c l\u00e0 ph\u1ea3i \u0111\u1eb7t v\u1eadt trong kho\u1ea3ng ti\u00eau c\u1ef1. V\u00e0 \u0111\u1ec3 ng\u01b0\u1eddi n\u00e0y quan s\u00e1t \u0111\u01b0\u1ee3c \u1ea3nh th\u00ec \u1ea3nh ph\u1ea3i c\u00e1ch m\u1eaft \u00edt nh\u1ea5t 25cm. Do m\u1eaft c\u00e1ch k\u00ednh l\u00fap 10cm n\u00ean \u1ea3nh ph\u1ea3i c\u00e1ch k\u00ednh l\u00fap \u00edt nh\u1ea5t 15cm.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ea5u k\u00ednh cho tr\u01b0\u1eddng h\u1ee3p \u1ea3nh \u1ea3o ta c\u00f3<\/p>\n<p dir=\"ltr\">1\/f = 1\/d \u2212 1\/d\u2032 =&gt; 1\/d = 1\/f + 1\/d\u2032<\/p>\n<p dir=\"ltr\">Do d\u2019 &gt; 15cm n\u00ean =&gt;1\/d &lt; 1\/5 + 1\/15 = 4\/15<\/p>\n<p dir=\"ltr\">=&gt; d &gt; 3,75 (cm)<\/p>\n<p dir=\"ltr\">V\u1eady v\u1eadt ph\u1ea3i \u0111\u1eb7t c\u00e1ch k\u00ednh l\u00fap t\u1eeb 3,75cm \u0111\u1ebfn 5cm.<\/p>\n<p dir=\"ltr\">B\u00e0i 20: M\u1ed9t k\u00ednh l\u00fap c\u00f3 ghi 5x tr\u00ean v\u00e0nh c\u1ee7a k\u00ednh. Ng\u01b0\u1eddi ta d\u00f9ng k\u00ednh n\u00e0y \u0111\u1ec3 quan s\u00e1t m\u1ed9t v\u1eadt nh\u1ecf. Ng\u01b0\u1eddi quan s\u00e1t c\u00f3 \u0111i\u1ec3m c\u1ef1c c\u1eadn c\u00e1ch m\u1eaft 20cm. Khi d\u00f9ng k\u00ednh l\u00fap ng\u01b0\u1eddi \u1ea5y \u0111\u1eb7t k\u00ednh s\u00e1t m\u1eaft v\u00e0 \u1ea3nh c\u1ee7a v\u1eadt hi\u1ec7n ra \u1edf \u0111\u00fang \u0111i\u1ec3m c\u1ef1c c\u1eadn c\u1ee7a m\u1eaft. S\u1ed1 ph\u00f3ng \u0111\u1ea1i c\u1ee7a \u1ea3nh l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<p dir=\"ltr\">Ti\u00eau c\u1ef1 c\u1ee7a k\u00ednh l\u00fap l\u00e0:<\/p>\n<p dir=\"ltr\">G = 25\/f =&gt; f= 25\/G = 25\/5 = 5cm<\/p>\n<p dir=\"ltr\">Khi d\u00f9ng k\u00ednh l\u00fap ng\u01b0\u1eddi \u1ea5y \u0111\u1eb7t k\u00ednh s\u00e1t m\u1eaft v\u00e0 \u1ea3nh c\u1ee7a v\u1eadt hi\u1ec7n ra \u1edf \u0111\u00fang \u0111i\u1ec3m c\u1ef1c c\u1eadn c\u1ee7a m\u1eaft =&gt; \u1ea3nh c\u00e1ch k\u00ednh l\u00fap 20cm.<\/p>\n<p dir=\"ltr\">K\u00ednh l\u00fap l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 c\u00f3 ti\u00eau c\u1ef1 5cm. \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ea5u k\u00ednh cho tr\u01b0\u1eddng h\u1ee3p \u1ea3nh \u1ea3o ta c\u00f3:<\/p>\n<p dir=\"ltr\">1\/f = 1\/d \u2212 1\/d\u2032 =&gt; 1\/d = 1\/f + 1\/d\u2032 =&gt; 1\/d = 1\/5 + 1\/20 = 1\/4<\/p>\n<p dir=\"ltr\">=&gt; H\u1ec7 s\u1ed1 ph\u00f3ng \u0111\u1ea1i c\u1ee7a \u1ea3nh l\u00e0: k = d\u2032\/d = 20\/4 = 5<\/p>\n<p dir=\"ltr\">K\u1ebft lu\u1eadn<\/p>\n<p dir=\"ltr\">B\u00e0i vi\u1ebft tr\u00ean \u0111\u00e3 t\u1ed5ng h\u1ee3p nh\u1eefng kh\u00e1i ni\u1ec7m v\u1ec1 k\u00ednh l\u00fap c\u0169ng nh\u01b0 c\u1ea5u t\u1ea1o v\u00e0 c\u00f4ng d\u1ee5ng c\u1ee7a k\u00ednh l\u00fap m\u00e0 c\u00e1c b\u1ea1n \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 9. Hy v\u1ecdng r\u1eb1ng, th\u00f4ng qua b\u00e0i vi\u1ebft n\u00e0y, c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c ch\u00fang trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y nh\u00e9!<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>K\u00ednh l\u00fap l\u00e0 m\u1ed9t d\u1ee5ng c\u1ee5 kh\u00e1 ph\u1ed5 bi\u1ebfn v\u00e0 d\u1ec5 d\u00e0ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c trong c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m, th\u1ebf nh\u01b0ng kh\u00f4ng h\u1eb3n ai trong ch\u00fang ta c\u0169ng nh\u1edb r\u00f5 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o c\u0169ng nh\u01b0 c\u00f4ng d\u1ee5ng c\u1ee7a n\u00f3. Trong b\u00e0i vi\u1ebft n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd gi\u00fap c\u00e1c b\u1ea1n&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-19275","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=19275"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19275\/revisions"}],"predecessor-version":[{"id":24335,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19275\/revisions\/24335"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=19275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=19275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=19275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}