{"id":10776,"date":"2021-11-22T17:25:09","date_gmt":"2021-11-22T10:25:09","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=10776"},"modified":"2021-11-22T18:19:51","modified_gmt":"2021-11-22T11:19:51","slug":"vay-anh-sang-la-gi-va-the-nao-la-hien-tuong-tan-xa-anh-sang","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vay-anh-sang-la-gi-va-the-nao-la-hien-tuong-tan-xa-anh-sang\/","title":{"rendered":"V\u1eady, \u00e1nh s\u00e1ng l\u00e0 g\u00ec v\u00e0 th\u1ebf n\u00e0o l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u00c1nh s\u00e1ng l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a v\u00f4 s\u1ed1 c\u00e1c h\u1ea1t photon. Photon\u0111\u1ebfn m\u1eaft ch\u00fang ta d\u01b0\u1edbi h\u00ecnh th\u1ee9c m\u1ed9t \u201cd\u1ea3i c\u1ea9u v\u1ed3ng\u201d m\u00e0 c\u00e1c nh\u00e0 v\u1eadt l\u00fd g\u1ecdi l\u00e0 quang ph\u1ed5. Quang ph\u1ed5 c\u00f3 r\u1ea5t nhi\u1ec1u m\u00e0u s\u1eafc, nh\u01b0ng v\u1ec1 c\u01a1 b\u1ea3n c\u00f3 7 m\u00e0u l\u00e0 \u0111\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm truy\u1ec1n trong kh\u00f4ng gian v\u1edbi b\u01b0\u1edbc s\u00f3ng ng\u1eafn, c\u00f2n c\u00e1c photonc\u1ee7a c\u00e1c d\u1ea3i m\u00e0u \u201cn\u00f3ng\u201d h\u01a1n th\u00ec truy\u1ec1n \u0111\u1ebfn m\u1eaft ch\u00fang ta v\u1edbi b\u01b0\u1edbc s\u00f3ng d\u00e0i. \u00c1nh s\u00e1ng M\u1eb7t tr\u1eddi l\u00e0 t\u1ed5ng h\u1ee3p c\u1ee7a t\u1ea5t c\u1ea3 nh\u1eefng m\u00e0u s\u1eafc \u1ea5y, nh\u01b0ng n\u00f3 kh\u00f4ng r\u1ef1c r\u1ee1 nh\u01b0 b\u1ea1n ngh\u0129 \u0111\u00e2u m\u00e0 ch\u1ec9 c\u00f3 m\u1ed9t m\u00e0u th\u00f4i m\u00e0u tr\u1eafng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c h\u1ea1t photonva ch\u1ea1m v\u1edbi b\u1ea5t k\u1ef3 m\u1ed9t v\u1eadt th\u1ec3 n\u00e0o \u0111\u00f3, ch\u00fang s\u1ebd c\u00f3 nh\u1eefng ph\u1ea3n \u1ee9ng r\u1ea5t \u0111a d\u1ea1ng. Ch\u00fang c\u00f3 th\u1ec3 b\u1eadt tr\u1edf l\u1ea1i (thu\u1eadt ng\u1eef v\u1eadt l\u00fd l\u00e0 ph\u1ea3n x\u1ea1), c\u00f3 th\u1ec3 b\u1eafn ra c\u00e1c ph\u00eda (t\u00e1n x\u1ea1), ho\u1eb7c th\u1eadm ch\u00ed ch\u00fang c\u00f3 th\u1ec3 \u0111i theo m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng (s\u1ef1 truy\u1ec1n \u00e1nh s\u00e1ng). C\u00f3 m\u1ed9t kh\u1ea3 n\u0103ng n\u1eefa l\u00e0 c\u00e1c h\u1ea1t photons\u1ebd \u201c\u0111\u00e2m s\u1ea9m\u201d v\u00e0o m\u1ed9t ph\u00e2n t\u1eed c\u1ee7a ch\u1ea5t t\u1ea1o th\u00e0nh v\u1eadt th\u1ec3, truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng cho ph\u00e2n t\u1eed n\u00e0y v\u00e0 \u201cch\u1ebft\u201d (h\u1ea5p th\u1ee5). C\u00e1c h\u1ea1t photonthu\u1ed9c nh\u1eefng d\u1ea3i m\u00e0u kh\u00e1c nhau c\u00f3 ph\u1ea3n \u1ee9ng kh\u00e1c nhau tu\u1ef7 theo v\u1eadt th\u1ec3 m\u00e0 n\u00f3 va ch\u1ea1m. Nh\u01b0 v\u1eady, c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n th\u1ebf n\u00e0y: Qu\u1ea3 t\u00e1o T\u00e2y c\u00f3 m\u00e0u \u0111\u1ecf h\u1ed3ng b\u1edfi v\u00ec n\u00f3 h\u1ea5p th\u1ee5 ph\u1ea9n l\u1edbn \u00e1nh s\u00e1ng \u201cn\u00f3ng\u201d, ch\u1ee7 y\u1ebfu l\u00e0 \u00e1nh s\u00e1ng \u0111\u1ecf, trong quang ph\u1ed5. \u00c1nh s\u00e1ng m\u00e0u l\u1ee5c, lam, ch\u00e0m, t\u00edm \u201cy\u1ebfu\u201d h\u01a1n b\u1ecb b\u1eadt ng\u01b0\u1ee3c tr\u1edf l\u1ea1i (cho n\u00ean kh\u00f4ng th\u1ec3 c\u00f3 qu\u1ea3 t\u00e1o m\u00e0u xanh n\u01b0\u1edbc bi\u1ec3n, tr\u1eeb phi c\u00f3 ai\u2026 nhu\u1ed9m n\u00f3).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eady l\u00e0 m\u1ecdi chuy\u1ec7n tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c1nh s\u00e1ng l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a v\u00f4 s\u1ed1 c\u00e1c h\u1ea1t photon. Photon\u0111\u1ebfn m\u1eaft ch\u00fang ta d\u01b0\u1edbi h\u00ecnh th\u1ee9c m\u1ed9t \u201cd\u1ea3i c\u1ea9u v\u1ed3ng\u201d m\u00e0 c\u00e1c nh\u00e0 v\u1eadt l\u00fd g\u1ecdi l\u00e0 quang ph\u1ed5. Quang ph\u1ed5 c\u00f3 r\u1ea5t nhi\u1ec1u m\u00e0u s\u1eafc, nh\u01b0ng v\u1ec1 c\u01a1 b\u1ea3n c\u00f3 7 m\u00e0u l\u00e0 \u0111\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm truy\u1ec1n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1,15],"tags":[],"class_list":["post-10776","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10776","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10776"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10776\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}