Khi ch\u1eadu thau \u0111\u1ef1ng \u0111\u1ea7y n\u01b0\u1edbc, nh\u00ecn nghi\u00eang t\u1eeb b\u00ean c\u1ea1nh, \u0111\u1ed9 s\u00e2u t\u1eeb m\u1eb7t n\u01b0\u1edbc t\u1edbi \u0111\u00e1y ch\u1eadu c\u00f3 v\u1ebb nh\u01b0 n\u00f4ng h\u01a1n. Hi\u1ec7n t\u01b0\u1ee3ng k\u00ec l\u1ea1 n\u00e0y, r\u1ed1t cu\u1ed9c \u0111\u00e3 x\u1ea3y ra nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n
Mu\u1ed1n l\u00e0m s\u00e1ng t\u1ecf t\u01b0\u1eddng t\u1eadn hi\u1ec7n t\u01b0\u1ee3ng c\u1ee7a n\u00f3 m\u1ed9t c\u00e1ch tri\u1ec7t \u0111\u1ec3, c\u1ea7n ph\u1ea3i t\u00ecm hi\u1ec3u r\u00f5 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u1ee7a \u00e1nh s\u00e1ng tr\u01b0\u1edbc \u0111\u00e3 . Th\u00ec ra, trong c\u00f9ng m\u1ed9t lo\u1ea1i m\u00f4i tr\u01b0\u1eddng, \u00e1nh s\u00e1ng bao gi\u1edd c\u0169ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng – \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t. Song, khi n\u00f3 t\u1eeb m\u1ed9t m\u00f4i tr\u01b0\u1eddng \u0111i v\u00e0o m\u1ed9t m\u00f4i tr\u01b0\u1eddng kh\u00e1c, v\u00ed d\u1ee5 nh\u01b0 t\u1eeb kh\u00f4ng kh\u00ed v\u00e0o n\u01b0\u1edbc, ho\u1eb7c t\u1eeb n\u01b0\u1edbc v\u00e0o kh\u00f4ng kh\u00ed, do t\u1ed1c \u0111\u1ed9 truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng trong hai lo\u1ea1i m\u00f4i tr\u01b0\u1eddng \u0111\u00f3 kh\u00e1c nhau, tr\u00ean m\u1eb7t ph\u00e2n c\u00e1ch c\u1ee7a hai m\u00f4i tr\u01b0\u1eddng, \u00e1nh s\u00e1ng s\u1ebd b\u1ecb cong l\u1ea1i, \u0111i theo m\u1ed9t \u0111\u01b0\u1eddng g\u1ea5p kh\u00fac. Lo\u1ea1i hi\u1ec7n t\u01b0\u1ee3ng g\u00e3 y g\u1eadp n\u00e0y c\u1ee7a \u00e1nh s\u00e1ng g\u1ecdi l\u00e0 kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng. Ch\u1eadu n\u01b0\u1edbc m\u00e0 b\u1ea1n tr\u00f4ng th\u1ea5y bi\u1ebfn th\u00e0nh n\u00f4ng \u0111i, ch\u00ednh l\u00e0 do kh\u00fac x\u1ea1 c\u1ee7a \u00e1nh s\u00e1ng g\u00e2y n\u00ean.<\/p>\n\n\n\n
B\u1ea1n xem k\u00eca, d\u01b0\u1edbi khe su\u1ed1i c\u00f3 con c\u00e1 nh\u1ecf, tia n\u1eafng t\u1eeb th\u00e2n c\u00e1 ph\u1ea3n x\u1ea1 ra, \u0111\u1ebfn m\u1eb7t ph\u00e2n c\u00e1ch gi\u1eefa n\u01b0\u1edbc v\u00e0 kh\u00f4ng kh\u00ed li\u1ec1n \u0111\u1ed5i h\u01b0\u1edbng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng, n\u00f3 g\u1ea5p nghi\u00eang v\u1edbi m\u1eb7t n\u01b0\u1edbc m\u1ed9t g\u00f3c. C\u00e1i \u0111\u1eadp v\u00e0o m\u1eaft ch\u00fang ta ch\u00ednh l\u00e0 tia s\u00e1ng \u0111\u00e3 g\u1ea5p kh\u00fac \u0111\u1ed5i h\u01b0\u1edbng. Song con m\u1eaft kh\u00f4ng c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c. V\u1eabn c\u1ee9 t\u01b0\u1edfng r\u1eb1ng tia s\u00e1ng \u0111\u00f3 theo \u0111\u01b0\u1eddng th\u1eb3ng chi\u1ebfu t\u1edbi, v\u00e0 ng\u1ed9nh\u1eadn \u1ea3nh \u1ea3o do tia s\u00e1ng \u0111\u00e3 b\u1ecb \u0111\u1ed5i h\u01b0\u1edbng \u0111\u00f3 t\u1ea1o ra l\u00e0 con c\u00e1 th\u1eadt. Nh\u01b0 v\u1eady, v\u1ecb tr\u00ed c\u1ee7a c\u00e1 trong n\u01b0\u1edbc nh\u00ecn c\u00f3 v\u1ebb \u1edf n\u00f4ng h\u01a1n. L\u00ed l\u1ebd khi\u1ebfn cho ch\u1eadu n\u01b0\u1edbc tr\u1edf th\u00e0nh n\u00f4ng h\u01a1n c\u0169ng l\u00e0 nh\u01b0 th\u1ebf \u0111\u1ea5y.<\/p>\n\n\n\n
Tr\u00f2 \u0111\u00f9a ngh\u1ecbch c\u1ee7a tia s\u00e1ng c\u0169ng gi\u1ed1ng nh\u01b0 c\u00e1ch bi\u1ebfn ho\u00e1 c\u1ee7a c\u00e1c nh\u00e0 \u1ea3o thu\u1eadt v\u1eady th\u00f4i. Khi ch\u00fang ta nh\u1eadn bi\u1ebft r\u00f5 \u0111\u1ee7 lo\u1ea1i t\u00ednh ch\u1ea5t c\u1ee7a \u00e1nh s\u00e1ng, th\u00ec s\u1ebd kh\u00f4ng b\u1ecb n\u00f3 “l\u1eeba g\u1ea1t” n\u1eefa. Ng\u01b0\u1eddi \u0111\u00e1nh c\u00e1 c\u00f3 kinh nghi\u1ec7m khi d\u00f9ng c\u00e1i xi\u00ean \u0111\u1ec3 x\u1ec9a c\u00e1, ng\u01b0\u1eddi \u1ea5y quy\u1ebft kh\u00f4ng x\u1ec9a th\u1eb3ng v\u00e0o con c\u00e1, v\u00ec r\u1eb1ng \u0111\u00f3 ch\u1eb3ng qua l\u00e0 \u1ea3nh \u1ea3o c\u1ee7a c\u00e1.<\/p>\n\n\n\n
Ch\u1eafc ch\u1eafn anh ta nh\u1eb1m v\u00e0o ch\u1ed7 h\u01a1i xa v\u00e0 h\u01a1i s\u00e2u m\u1ed9t ch\u00fat, d\u00f9ng s\u1ee9c \u0111\u00e2m t\u1edbi. Nh\u01b0 v\u1eady, m\u1ed9t con c\u00e1 s\u1ed1ng gi\u00e3 y gi\u1ee5a t\u1ee9 tung s\u1ebd b\u1ecb xi\u00ean ch\u1eb7t. \u0110\u00f3 \u0111\u00fang l\u00e0 kinh nghi\u1ec7m phong ph\u00fa m\u00e0 ng\u01b0\u1eddi \u0111\u00e1nh c\u00e1 t\u00edch lu\u1ef9 \u0111\u01b0\u1ee3c qua th\u1ef1c t\u1ebf l\u00e2u d\u00e0i c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng c\u1ee7a \u00e1nh s\u00e1ng; Kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Khi ch\u1eadu thau \u0111\u1ef1ng \u0111\u1ea7y n\u01b0\u1edbc, nh\u00ecn nghi\u00eang t\u1eeb b\u00ean c\u1ea1nh, \u0111\u1ed9 s\u00e2u t\u1eeb m\u1eb7t n\u01b0\u1edbc t\u1edbi \u0111\u00e1y ch\u1eadu c\u00f3 v\u1ebb nh\u01b0 n\u00f4ng h\u01a1n. Hi\u1ec7n t\u01b0\u1ee3ng k\u00ec l\u1ea1 n\u00e0y, r\u1ed1t cu\u1ed9c \u0111\u00e3 x\u1ea3y ra nh\u01b0 th\u1ebf n\u00e0o? Mu\u1ed1n l\u00e0m s\u00e1ng t\u1ecf t\u01b0\u1eddng t\u1eadn hi\u1ec7n t\u01b0\u1ee3ng c\u1ee7a n\u00f3 m\u1ed9t c\u00e1ch tri\u1ec7t \u0111\u1ec3, c\u1ea7n ph\u1ea3i t\u00ecm hi\u1ec3u […]<\/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":[15,7],"tags":[],"class_list":["post-5768","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5768","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=5768"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5768\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}