{"id":14815,"date":"2025-06-10T07:13:48","date_gmt":"2025-06-10T00:13:48","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14815"},"modified":"2025-07-05T12:40:05","modified_gmt":"2025-07-05T05:40:05","slug":"the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/","title":{"rendered":"Th\u1ebf n\u00e0o l\u00e0 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng? N\u00eau \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng v\u1eadt l\u00fd 7"},"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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_chieu_anh_sang_la_gi\" >Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng l\u00e0 g\u00ec?<\/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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_loai_phan_xa_anh_sang\" >Ph\u00e2n lo\u1ea1i ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_xa_thuong_xuyen_la_gi\" >Ph\u1ea3n x\u1ea1 th\u01b0\u1eddng xuy\u00ean l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_xa_khuech_tan_la_gi\" >Ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Luat_phan_anh_anh_sang\" >Lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng<\/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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Cuoc_thi_nghiem\" >Cu\u1ed9c th\u00ed nghi\u1ec7m<\/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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phat_bieu_theo_luat_phan_anh_anh_sang\" >Ph\u00e1t bi\u1ec3u theo lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng<\/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\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_anh_ve_vat_lieu_phan_chieu_anh_sang\" >Ph\u1ea3n \u00e1nh v\u1ec1 v\u1eadt li\u1ec7u ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_chieu_anh_sang_cua_mat\" >Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng c\u1ee7a m\u1eaft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_chieu_anh_sang_tren_guong_loi\" >Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng tr\u00ean g\u01b0\u01a1ng l\u1ed3i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Phan_chieu_anh_sang_tren_guong_lom\" >Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng tr\u00ean g\u01b0\u01a1ng l\u00f5m<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Ve_hinh_dang_cua_dinh_luat_phan_chieu_anh_sang\" >V\u1ebd h\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ecbnh lu\u1eadt ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Mot_so_loai_bai_tap_ve_luat_phan_xa_anh_sang_cua_lop_7\" >M\u1ed9t s\u1ed1 lo\u1ea1i b\u00e0i t\u1eadp v\u1ec1 lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u1ee7a l\u1edbp 7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/the-nao-la-phan-xa-anh-sang-neu-dinh-luat-phan-xa-anh-sang-vat-ly-7\/#Mot_so_bai_tap_ve_luat_phan_xa_anh_sang_co_ban_voi_cau_tra_loi\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u01a1 b\u1ea3n (v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi)<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p dir=\"ltr\">Hi\u1ec7n t\u01b0\u1ee3ng \u00e1nh s\u00e1ng ph\u1ea3n \u00e1nh l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng h\u00e0ng ng\u00e0y trong cu\u1ed9c s\u1ed1ng v\u00e0 ch\u00fang t\u00f4i c\u0169ng r\u1ea5t d\u1ec5 ch\u00fa \u00fd. V\u1eady ph\u1ea3n x\u1ea1 &amp; \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng l\u00e0 g\u00ec? H\u00f4m nay, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ti\u1ebfp t\u1ee5c chia s\u1ebb v\u1edbi h\u1ecd b\u00e0i vi\u1ebft v\u1ec1 s\u1ef1 ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng, \u0111\u1ec3 h\u1ecd c\u00f3 th\u1ec3 hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng l\u00fd thuy\u1ebft n\u00e0y trong th\u1ef1c t\u1ebf.<\/p>\n<p>                        Xem t\u1ea5t c\u1ea3<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_chieu_anh_sang_la_gi\"><\/span>Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng l\u00e0 g\u00ec?<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\/phan-xa-anh-sang-1.jpg\" alt=\"\u00c1nh s\u00e1ng ph\u1ea3n chi\u1ebfu trong cu\u1ed9c s\u1ed1ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><em>Khi ch\u00fang ta chi\u1ebfu m\u1ed9t tia s\u00e1ng tr\u00ean b\u1ea5t k\u1ef3 v\u1eadt th\u1ec3 n\u00e0o, \u00e1nh s\u00e1ng \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 ho\u00e0n to\u00e0n, hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng. <\/em><\/p>\n<p dir=\"ltr\">N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 sau nh\u01b0 sau: &#8220;Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng x\u1ea3y ra khi chi\u1ebfu m\u1ed9t tia s\u00e1ng v\u00e0o g\u01b0\u01a1ng v\u00e0 tr\u1edf l\u1ea1i v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u0169.&#8221;<\/p>\n<p dir=\"ltr\">Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra trong c\u1ea3 m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean v\u00e0 nh\u00e2n t\u1ea1o v\u00e0 c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_loai_phan_xa_anh_sang\"><\/span>Ph\u00e2n lo\u1ea1i ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng bao g\u1ed3m 2 lo\u1ea1i: Ph\u1ea3n x\u1ea1 th\u00f4ng th\u01b0\u1eddng v\u00e0 ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n.<\/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\/phan-xa-anh-sang-2.jpg\" alt=\"Ph\u00e2n lo\u1ea1i ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_xa_thuong_xuyen_la_gi\"><\/span>Ph\u1ea3n x\u1ea1 th\u01b0\u1eddng xuy\u00ean l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi c\u00f3 m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng \u0111\u1ebfn song song v\u00e0 \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 song song theo m\u1ed9t h\u01b0\u1edbng, th\u1eddi gian n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 th\u00f4ng th\u01b0\u1eddng (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u1ea3n x\u1ea1 ph\u1ea3n x\u1ea1). <\/p>\n<p dir=\"ltr\">Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u00e1c tia song song v\u00e0 lu\u00f4n song song sau khi ph\u1ea3n x\u1ea1, n\u00f3 ch\u1ec9 \u0111i theo m\u1ed9t h\u01b0\u1edbng v\u00e0 xu\u1ea5t hi\u1ec7n t\u1eeb c\u00e1c b\u1ec1 m\u1eb7t nh\u1eb5n nh\u01b0 g\u01b0\u01a1ng ph\u1eb3ng ho\u1eb7c b\u1ec1 m\u1eb7t kim lo\u1ea1i cao. <\/p>\n<p dir=\"ltr\">V\u00ec v\u1eady, m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd t\u1ea1o ra ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng th\u01b0\u1eddng xuy\u00ean (\u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 ph\u1ea3n x\u1ea1).<\/p>\n<p dir=\"ltr\">Khi m\u1ed9t ch\u00f9m tia song song r\u01a1i tr\u00ean m\u1ed9t b\u1ec1 m\u1eb7t nh\u1eb5n do g\u00f3c t\u1edbi v\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng ho\u1eb7c b\u1eb1ng nhau, n\u00f3 ch\u1ec9 \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 d\u01b0\u1edbi d\u1ea1ng ch\u00f9m tia \u00e1nh s\u00e1ng theo m\u1ed9t h\u01b0\u1edbng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_xa_khuech_tan_la_gi\"><\/span>Ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n x\u1ea3y ra khi c\u00f3 m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng song song \u0111\u1ec3 \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 theo nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau. <\/p>\n<p dir=\"ltr\">C\u00e1c tia s\u00e1ng song song t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y kh\u00f4ng c\u00f2n t\u1ed3n t\u1ea1i song song sau khi ph\u1ea3n x\u1ea1, nh\u01b0ng ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n theo c\u00e1c h\u01b0\u1edbng kh\u00e1c nhau, hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u1ea3n x\u1ea1 t\u00e1n x\u1ea1 ho\u1eb7c khu\u1ebfch t\u00e1n kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. <\/p>\n<p dir=\"ltr\">\u00c1nh s\u00e1ng khu\u1ebfch t\u00e1n n\u00e0y \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi c\u00e1c b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1 nh\u01b0 b\u00e0n, gh\u1ebf, nh\u00e0 g\u1ed7, t\u01b0\u1eddng, b\u00eca c\u1ee9ng, gi\u1ea5y ho\u1eb7c v\u1eadt kim lo\u1ea1i ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng. B\u1edfi v\u00ec c\u00f3 m\u1ed9t g\u00f3c ho\u00e0n to\u00e0n kh\u00e1c nhau v\u00e0 m\u1ed9t g\u00f3c ph\u1ea3n x\u1ea1, c\u00e1c tia s\u00e1ng song song r\u01a1i tr\u00ean m\u1ed9t b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1 s\u1ebd \u0111i theo nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau.<\/p>\n<p dir=\"ltr\">Xem th\u00eam: Ch\u00f9m tia l\u00e0 g\u00ec? C\u00f3 bao nhi\u00eau lo\u1ea1i d\u1ea7m?<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Luat_phan_anh_anh_sang\"><\/span>Lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cuoc_thi_nghiem\"><\/span>Cu\u1ed9c th\u00ed nghi\u1ec7m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">S\u1eed d\u1ee5ng \u0111\u00e8n pin \u0111\u1ec3 hi\u1ec3n th\u1ecb m\u1ed9t tia \u0111\u1ebfn b\u1ec1 m\u1eb7t g\u01b0\u01a1ng ph\u1eb3ng \u0111\u01b0\u1ee3c \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t m\u1ea3nh gi\u1ea5y (nh\u01b0 h\u00ecnh b\u00ean d\u01b0\u1edbi) v\u00e0 quan s\u00e1t.<\/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\/phan-xa-anh-sang-3.png\" alt=\"Th\u00ed nghi\u1ec7m ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">B\u00ecnh lu\u1eadn<\/p>\n<p dir=\"ltr\">Tia \u00e1nh s\u00e1ng ph\u00e1t ra t\u1eeb \u0111\u00e8n pin n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t gi\u1ea5y, khi g\u1eb7p g\u01b0\u01a1ng, c\u00e1c tia s\u00e1ng b\u1ecb s\u1ed1c (tia IR). Tia \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tia ph\u1ea3n x\u1ea1. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phat_bieu_theo_luat_phan_anh_anh_sang\"><\/span>Ph\u00e1t bi\u1ec3u theo lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u1ed9i dung c\u1ee7a lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c n\u00eau nh\u01b0 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1, tia ph\u1ea3n x\u1ea1 s\u1ebd \u1edf trong m\u1eb7t ph\u1eb3ng ch\u1ee9a c\u00e1c tia \u0111\u1ebfn v\u00e0 g\u01b0\u01a1ng c\u1ee7a g\u01b0\u01a1ng t\u1ea1i \u0111\u00edch.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">G\u00f3c ph\u1ea3n x\u1ea1 c\u0169ng s\u1ebd b\u1eb1ng v\u1edbi g\u00f3c \u0111\u1ebfn.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Ghi ch\u00fa:<\/p>\n<p dir=\"ltr\">\u0110\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u1ea3 g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng l\u00f5m v\u00e0 g\u01b0\u01a1ng l\u1ed3i. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Tia v\u00e0 tia ph\u1ea3n x\u1ea1 \u0111\u1ec1u n\u1eb1m trong c\u00f9ng m\u1ed9t m\u1eb7t ph\u1eb3ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">G\u00f3c ph\u1ea3n x\u1ea1 lu\u00f4n b\u1eb1ng v\u1edbi g\u00f3c s\u1eafp t\u1edbi.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Ngo\u00e0i ra, khi m\u1ed9t tia s\u00e1ng chi\u1ebfu v\u00e0o b\u1ec1 m\u1eb7t g\u01b0\u01a1ng, g\u00f3c v\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 c\u1ee7a \u00e1nh s\u00e1ng \u0111\u00f3 s\u1ebd l\u00e0 0. Sau \u0111\u00f3, \u00e1nh s\u00e1ng n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n c\u1ee7a v\u1eadt th\u1ec3.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_anh_ve_vat_lieu_phan_chieu_anh_sang\"><\/span>Ph\u1ea3n \u00e1nh v\u1ec1 v\u1eadt li\u1ec7u ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_chieu_anh_sang_cua_mat\"><\/span>Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng c\u1ee7a m\u1eaft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/phan-xa-anh-sang-4.jpg\" alt=\"Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng cho \u0111\u00f4i m\u1eaft c\u1ee7a con ng\u01b0\u1eddi. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Khi \u00e1nh s\u00e1ng chi\u1ebfu v\u00e0o m\u1eaft ng\u01b0\u1eddi, \u0111\u00f4i m\u1eaft c\u1ee7a \u0111\u00f4i m\u1eaft s\u1ebd b\u1ecb thu h\u1eb9p. V\u00f2ng ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng chi\u1ebfu v\u00e0o ph\u1ea7n ti\u1ebfp nh\u1eadn \u00e1nh s\u00e1ng s\u1ebd \u0111i theo d\u00e2y th\u1ea7n kinh th\u1ecb gi\u00e1c v\u00e0o gi\u1ea3 v\u1edd trong n\u00e3o gi\u1eefa. <\/p>\n<p dir=\"ltr\">Sau \u0111\u00f3, h\u1ecd ch\u1ea1y v\u00e0o Edinger &#8211; Westphal v\u00e0 ch\u1ea1y tr\u1edf l\u1ea1i c\u00e1c d\u00e2y th\u1ea7n kinh th\u00f4ng th\u01b0\u1eddng (d\u00e2y th\u1ea7n kinh s\u1ecd 3) \u0111\u1ec3 x\u00e2m nh\u1eadp v\u00e0o c\u00e1c d\u00e2y th\u1ea7n kinh b\u1ea1ch huy\u1ebft. Khi h\u1ecd di chuy\u1ec3n v\u00e0o, h\u1ecd s\u1ebd thu nh\u1ecf m\u00ed m\u1eaft, gi\u1ea3m \u0111\u1ed3ng t\u1eed. Hi\u1ec7n t\u01b0\u1ee3ng c\u1ee7a con m\u1eaft thu h\u1eb9p n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u1ee7a \u0111\u1ed3ng t\u1eed.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_chieu_anh_sang_tren_guong_loi\"><\/span>Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng tr\u00ean g\u01b0\u01a1ng l\u1ed3i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">G\u01b0\u01a1ng c\u1ea7u l\u1ed3i c\u00f3 m\u1ed9t ph\u1ea7n c\u1ee7a h\u00ecnh d\u1ea1ng h\u00ecnh c\u1ea7u v\u00e0 m\u1eb7t ph\u1eb3ng cong ph\u1ea3n x\u1ea1 v\u1ec1 h\u01b0\u1edbng c\u1ee7a ngu\u1ed3n s\u00e1ng. <\/p>\n<p dir=\"ltr\">G\u01b0\u01a1ng l\u1ed3i c\u00f3 kh\u1ea3 n\u0103ng bi\u1ebfn ch\u00f9m tia th\u00e0nh song song v\u1edbi ch\u00f9m tia ph\u1ea3n x\u1ea1 kh\u00e1c nhau v\u00e0 t\u1eeb ch\u00f9m tia sang s\u1ef1 h\u1ed9i t\u1ee5 th\u00e0nh ch\u00f9m tia song song ho\u1eb7c ph\u00e2n k\u1ef3.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phan_chieu_anh_sang_tren_guong_lom\"><\/span>Ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng tr\u00ean g\u01b0\u01a1ng l\u00f5m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">G\u01b0\u01a1ng l\u00f5m \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t ph\u1ea7n h\u00ecnh c\u1ea7u v\u00e0 ch\u00fang c\u00f3 m\u1eb7t l\u00f5m \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 v\u1ec1 ph\u00eda \u00e1nh s\u00e1ng. <\/p>\n<p dir=\"ltr\">Lo\u1ea1i g\u01b0\u01a1ng n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch ch\u00ednh \u0111\u1ec3 h\u1ed9i t\u1ee5 \u00e1nh s\u00e1ng v\u00ec ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng song song v\u1edbi ch\u00f9m s\u00e1ng. <\/p>\n<p dir=\"ltr\">Kh\u00e1c v\u1edbi g\u01b0\u01a1ng l\u1ed3i, g\u01b0\u01a1ng l\u00f5m c\u00f3 th\u1ec3 bi\u1ebfn t\u1eeb ch\u00f9m \u00e1nh s\u00e1ng chuy\u1ec3n h\u01b0\u1edbng ho\u1eb7c thu th\u1eadp th\u00e0nh m\u1ed9t ch\u00f9m ph\u1ea3n x\u1ea1 song song v\u00e0 t\u1eeb m\u1ed9t ch\u00f9m ph\u00e2n k\u1ef3 th\u00e0nh m\u1ed9t ch\u00f9m ph\u1ea3n x\u1ea1. <\/p>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, v\u1edbi s\u1ef1 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u1ee7a g\u01b0\u01a1ng l\u00f5m, n\u00f3 c\u00f3 th\u1ec3 l\u00e0m n\u00f3ng ho\u1eb7c \u0111\u1ed1t c\u00e1c v\u1eadt th\u1ec3 n\u1ebfu c\u00f3 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi.<\/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\/phan-xa-anh-sang-5.jpeg\" alt=\"Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng tr\u00ean g\u01b0\u01a1ng l\u1ed3i v\u00e0 g\u01b0\u01a1ng l\u00f5m. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ve_hinh_dang_cua_dinh_luat_phan_chieu_anh_sang\"><\/span>V\u1ebd h\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ecbnh lu\u1eadt ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Chi\u1ebfu m\u1ed9t tia s\u00e1ng tr\u00ean b\u1ec1 m\u1eb7t g\u01b0\u01a1ng ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t m\u1ea3nh gi\u1ea5y v\u00e0 quan s\u00e1t.<\/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\/phan-xa-anh-sang-6.PNG\" alt=\"H\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ecbnh lu\u1eadt ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\"><\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3: <\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Si \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Ray<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">IR \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tia ph\u1ea3n x\u1ea1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">In \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tuy\u1ebfn h\u1ee3p ph\u00e1p<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Sin = t\u00f4i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 g\u00f3c \u0111\u1ebfn<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Nir = i &#8216;\u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 g\u00f3c ph\u1ea3n x\u1ea1<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Mot_so_loai_bai_tap_ve_luat_phan_xa_anh_sang_cua_lop_7\"><\/span>M\u1ed9t s\u1ed1 lo\u1ea1i b\u00e0i t\u1eadp v\u1ec1 lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u1ee7a l\u1edbp 7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Do l\u01b0\u1ee3ng ki\u1ebfn \u200b\u200bth\u1ee9c ng\u00e0y c\u00e0ng t\u0103ng, sinh vi\u00ean c\u1ea7n n\u1eafm b\u1eaft m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp ch\u00ednh trong ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3ng d\u1ea1y, \u0111\u1ec3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u1ed1t c\u00e1c b\u00e0i ki\u1ec3m tra s\u1eafp t\u1edbi. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n<ul>\n<li>M\u1eabu 1: V\u1ebd m\u1ed9t tia ph\u1ea3n chi\u1ebfu<\/li>\n<li>M\u1eabu 2: X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a g\u01b0\u01a1ng<\/li>\n<li>M\u1eabu 3: Bi\u1ebfn g\u01b0\u01a1ng<\/li>\n<\/ul>\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y, h\u00e3y m\u1eddi b\u1ea1n \u0111\u1ebfn m\u1ed9t ph\u1ea7n c\u1ee7a m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1edbi \u0111\u1ecbnh lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng c\u01a1 b\u1ea3n c\u1ee7a l\u1edbp 7 ngay b\u00ean d\u01b0\u1edbi.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_ve_luat_phan_xa_anh_sang_co_ban_voi_cau_tra_loi\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u01a1 b\u1ea3n (v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">C\u00e2u 1: \u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y kh\u00f4ng thu\u1ed9c v\u1ec1 Lu\u1eadt ph\u1ea3n \u00e1nh \u00e1nh s\u00e1ng:<\/p>\n<p dir=\"ltr\">A. g\u00f3c ph\u1ea3n x\u1ea1 theo g\u00f3c<\/p>\n<p dir=\"ltr\">B. Tia theo t\u1ef7 l\u1ec7<\/p>\n<p dir=\"ltr\">C. Tia ph\u1ea3n x\u1ea1 n\u1eb1m trong m\u1eb7t ph\u1eb3ng ch\u1ee9a c\u00e1c tia \u0111\u1ebfn v\u00e0 tuy\u1ebfn \u0111\u01b0\u1eddng c\u1ee7a m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng.<\/p>\n<p dir=\"ltr\">D. G\u00f3c \u0111\u01b0\u1ee3c kh\u1edbp v\u1edbi s\u1ef1 c\u1ed1 v\u00e0 \u0111\u01b0\u1eddng h\u1ee3p ph\u00e1p theo g\u00f3c \u0111\u1ed9 ph\u1ea3n x\u1ea1 v\u00e0 con \u0111\u01b0\u1eddng h\u1ee3p ph\u00e1p<\/p>\n<p dir=\"ltr\">C\u00e2u 2: D\u1ef1 \u00e1n m\u1ed9t tia s\u00e1ng \u0111\u1ebfn g\u01b0\u01a1ng ph\u1eb3ng, ch\u00fang ta c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t tia ph\u1ea3n chi\u1ebfu \u0111\u1ebfn tia \u0111\u1ebfn g\u00f3c 40 \u0111\u1ed9. Gi\u00e1 tr\u1ecb c\u1ee7a gi\u00e1 tr\u1ecb l\u00e0 g\u00ec? Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c nh\u1ea5t v\u00e0 c\u00e1ch l\u00e0m:<\/p>\n<p dir=\"ltr\">A. 20 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">B. 30 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C. 40 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">D. 45 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C\u00e2u 3: chi\u1ebfu m\u1ed9t tia l\u00ean SI tr\u00ean g\u01b0\u01a1ng ph\u1eb3ng ho\u1eb7c m\u1eb7t ph\u1eb3ng ph\u1ea3n chi\u1ebfu, ch\u00fang ta c\u00f3 \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 IR v\u1edbi tia \u0111\u1ebfn SI \u1edf g\u00f3c 60 \u0111\u1ed9. T\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a g\u00f3c v\u1edbi I v\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 R. (L\u01b0u \u00fd r\u1eb1ng quy \u01b0\u1edbc I l\u00e0 g\u00f3c \u0111\u1ebfn v\u00e0 r l\u00e0 g\u00f3c ph\u1ea3n x\u1ea1)<\/p>\n<p dir=\"ltr\">A. I = r = 60 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">B. I = r = 30 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C. I = 20 \u0111\u1ed9, r = 40 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">D. I = r = 120 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C\u00e2u 4: D\u1ef1 \u00e1n m\u1ed9t tia s\u00e1ng SI tr\u00ean m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng, tia ph\u1ea3n x\u1ea1 IR c\u1ee7a SI thu \u0111\u01b0\u1ee3c tr\u00ean m\u1eb7t ph\u1eb3ng n\u00e0o?<\/p>\n<p dir=\"ltr\">A. M\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng<\/p>\n<p dir=\"ltr\">B. M\u00e1y bay \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi tia v\u00e0 g\u01b0\u01a1ng<\/p>\n<p dir=\"ltr\">C. M\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi t\u1ef7 l\u1ec7 m\u1eafc<\/p>\n<p dir=\"ltr\">D. M\u00e1y bay \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi tia \u0111\u1ebfn v\u00e0 ph\u00e1p c\u1ee7a g\u01b0\u01a1ng \u1edf \u0111\u00edch<\/p>\n<p dir=\"ltr\">C\u00e2u 5: \u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang v\u1ec1 Lu\u1eadt Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng:<\/p>\n<p dir=\"ltr\">A. Tia vu\u00f4ng g\u00f3c v\u1edbi tia ph\u1ea3n chi\u1ebfu<\/p>\n<p dir=\"ltr\">B. Tia \u0111\u1ebfn c\u1ee7a c\u00e1c tia ph\u1ea3n x\u1ea1<\/p>\n<p dir=\"ltr\">C. g\u00f3c \u0111\u1ebfn b\u1eb1ng v\u1edbi g\u00f3c ph\u1ea3n x\u1ea1<\/p>\n<p dir=\"ltr\">D. g\u00f3c c\u1ed9ng c\u1ee7a \u0111\u1ed9 ph\u1ea3n x\u1ea1 b\u1eb1ng 180 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C\u00e2u 6: \u0110\u01b0a ra m\u1ed9t tia SI \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng 30 \u0111\u1ed9. Tia ph\u1ea3n chi\u1ebfu l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">A. 30 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">B. 50 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C. 60 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">D. 90 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi:<\/p>\n<p dir=\"ltr\">C\u00e2u 1: Kh\u00f4ng c\u00f3 so s\u00e1nh \u0111\u1ed9 d\u00e0i gi\u1eefa c\u00e1c tia, chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c tia l\u00e0 v\u00f4 h\u1ea1n. =&gt; Ch\u1ecdn C\u00e2u h\u1ecfi B<\/p>\n<p dir=\"ltr\">C\u00e2u 2: G\u00f3c \u0111\u1ebfn = g\u00f3c ph\u1ea3n x\u1ea1. Do \u0111\u00f3, Ph\u00e1p l\u00e0 b\u1ed9 ph\u1eadn c\u1ee7a g\u00f3c \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi s\u1ef1 ph\u1ea3n x\u1ea1 v\u00e0 s\u1ef1 c\u1ed1.<\/p>\n<p dir=\"ltr\">=&gt; H\u00f3a th\u00e2n = g\u00f3c ph\u1ea3n x\u1ea1 = 40\/2 = 20 (\u0111\u1ed9) =&gt; ch\u1ecdn c\u00e2u a<\/p>\n<p dir=\"ltr\">C\u00e2u 3: Theo \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng, g\u00f3c lu\u00f4n c\u00f3 g\u00f3c ph\u1ea3n x\u1ea1, t\u1ee9c l\u00e0 i = r. Do \u0111\u00f3, ch\u00fang t\u00f4i lo\u1ea1i tr\u1eeb t\u00f9y ch\u1ecdn C khi R # I.<\/p>\n<p dir=\"ltr\">Ch\u00fang ta c\u00f3 i = r r\u1eb1ng i + r = 60 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">C\u00e2u 4: Theo lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng, tia ph\u1ea3n x\u1ea1 n\u1eb1m trong m\u1eb7t ph\u1eb3ng c\u00f3 ch\u1ee9a tia \u0111\u1ebfn v\u00e0 tuy\u1ebfn \u0111\u01b0\u1eddng h\u1ee3p ph\u00e1p c\u1ee7a g\u01b0\u01a1ng t\u1ea1i \u0111\u00edch =&gt; Ch\u1ecdn C\u00e2u h\u1ecfi D<\/p>\n<p dir=\"ltr\">C\u00e2u 5: Theo \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng, g\u00f3c b\u1eb1ng v\u1edbi g\u00f3c ph\u1ea3n x\u1ea1 =&gt; Ch\u1ecdn C\u00e2u h\u1ecfi C<\/p>\n<p dir=\"ltr\">C\u00e2u 6: SI Rays v\u1edbi m\u1ed9t m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng 30 \u0111\u1ed9. C\u00f3 m\u1ed9t Ph\u00e1p vu\u00f4ng g\u00f3c v\u1edbi g\u01b0\u01a1ng:<\/p>\n<p dir=\"ltr\">=&gt; Sin = 90 &#8211; 30 = 60 \u0111\u1ed9, =&gt; g\u00f3c s\u1eafp t\u1edbi l\u00e0 60 \u0111\u1ed9<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng ch\u00fang ta c\u00f3: i = r = 60 \u0111\u1ed9. =&gt; Ch\u1ecdn C\u00e2u h\u1ecfi C<\/p>\n<p>B\u00e0i b\u00e1o tr\u00ean \u0111\u00e3 t\u00f3m t\u1eaft l\u00fd thuy\u1ebft c\u0169ng nh\u01b0 c\u00e1c b\u00e0i t\u1eadp v\u1ec1 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng. Hy v\u1ecdng, th\u00f4ng qua ki\u1ebfn \u200b\u200bth\u1ee9c \u0111\u01b0\u1ee3c chia s\u1ebb trong b\u00e0i vi\u1ebft n\u00e0y, h\u1ecd c\u00f3 th\u1ec3 hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng r\u1ea5t nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng. C\u1ea3m \u01a1n b\u1ea1n \u0111\u00e3 \u0111\u1ecdc b\u00e0i vi\u1ebft.<\/p>\n<p>Ngu\u1ed3n: <a href=\"https:\/\/www.ckconitsha.com\/vn\/\">https:\/\/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>Hi\u1ec7n t\u01b0\u1ee3ng \u00e1nh s\u00e1ng ph\u1ea3n \u00e1nh l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng h\u00e0ng ng\u00e0y trong cu\u1ed9c s\u1ed1ng v\u00e0 ch\u00fang t\u00f4i c\u0169ng r\u1ea5t d\u1ec5 ch\u00fa \u00fd. V\u1eady ph\u1ea3n x\u1ea1 &amp; \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng l\u00e0 g\u00ec? H\u00f4m nay, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ti\u1ebfp t\u1ee5c chia s\u1ebb v\u1edbi h\u1ecd b\u00e0i vi\u1ebft v\u1ec1 s\u1ef1&#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-14815","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14815","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=14815"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14815\/revisions"}],"predecessor-version":[{"id":17885,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14815\/revisions\/17885"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}