M\u1ed9t \u0111\u00f4i gi\u00e0y da v\u1eeba c\u0169 v\u1eeba b\u1ea9n, ch\u1ec9 c\u1ea7n lau s\u1ea1ch b\u1ee5i b\u1eb7m, b\u00f4i xi \u0111\u00e1nh gi\u1ea7y v\u00e0o, c\u1ea9n th\u1eadn x\u00e1t nh\u1eb9 m\u1ed9t l\u01b0\u1ee3t th\u00ec \u0111\u00f4i gi\u00e0y \u0111\u00e3 v\u1eeba b\u00f3ng v\u1eeba \u0111\u1eb9p m\u1eaft r\u1ed3i. \u0110\u00f3 l\u00e0 v\u00ec l\u00ed do g\u00ec v\u1eady?<\/p>\n\n\n\n
Th\u00ec ra, \u00e1nh s\u00e1ng chi\u1ebfu t\u1edbi b\u1ea5t c\u1ee9 tr\u00ean b\u1ec1 m\u1eb7t n\u00e0o c\u0169ng \u0111\u1ec1u c\u00f3 th\u1ec3 x\u1ea3y ra ph\u1ea3n x\u1ea1. V\u00ed d\u1ee5 m\u1eb7t b\u1eb1ng \u0111\u00f3 tr\u01a1n b\u00f3ng, th\u1ebf th\u00ec c\u00f3 th\u1ec3 sinh ra ph\u1ea3n quang r\u1ea5t m\u1ea1nh, nh\u00ecn v\u00e0o r\u1ea5t s\u00e1ng. C\u00f3 l\u1ebd b\u1ea1n s\u1ebd h\u1ecfi: v\u00ec sao tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 nh\u01b0 t\u01b0\u1eddng nh\u00e0, b\u00e0n v.v. kh\u00f4ng nh\u00ecn th\u1ea5y ph\u1ea3n quang r\u1ea5t m\u1ea1nh nh\u1ec9?<\/p>\n\n\n\n
B\u1ec1 m\u1eb7t c\u00e1c v\u1eadt th\u1ec3 nh\u01b0 t\u01b0\u1eddng, b\u00e0n v.v., kh\u00f4ng th\u1eadt s\u1ef1 tr\u01a1n b\u00f3ng \u0111\u00e2u. B\u1ea1n c\u1ea7m m\u1ed9t k\u00ednh l\u00fap quan s\u00e1t t\u1ec9 m\u1ec9 m\u1ed9t l\u00fac, th\u00ec s\u1ebd ph\u00e1t hi\u1ec7n b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 \u0111\u00f3 \u0111\u1ec1u x\u00f9 x\u00ec th\u00f4 r\u00e1p, cao th\u1ea5p kh\u00f4ng \u0111\u1ec1u. B\u1ec1 m\u1eb7t th\u00f4 r\u00e1p c\u0169ng c\u00f3 th\u1ec3 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng. C\u00f3 \u0111i\u1ec1u n\u00f3 ph\u1ea3n x\u1ea1 ph\u00e2n t\u00e1n v\u1ec1 b\u1ed1n ph\u01b0\u01a1ng t\u00e1m h\u01b0\u1edbng, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1eadp trung v\u00e0o m\u1ed9t h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh. C\u00e1i \u0111\u00f3 trong v\u1eadt l\u00ed g\u1ecdi l\u00e0 s\u1ef1 ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n v.v. V\u00ec v\u1eady, ch\u00fang ta kh\u00f4ng tr\u00f4ng th\u1ea5y \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 m\u1ea1nh.<\/p>\n\n\n\n
B\u1ec1 m\u1eb7t c\u1ee7a chi\u1ebfc gi\u1ea7y da c\u0169ng kh\u00f4ng ph\u1ea3i r\u1ea5t tr\u01a1n b\u00f3ng. N\u1ebfu chi\u1ebfc gi\u1ea7y b\u1ecb b\u1ea9n th\u00ec c\u1ed1 nhi\u00ean l\u00e0 c\u00e0ng th\u00f4 r\u00e1p h\u01a1n. Nh\u01b0 v\u1eady, n\u00f3 kh\u00f4ng th\u1ec3 l\u00e0m cho tia s\u00e1ng ph\u1ea3n x\u1ea1 t\u1eadp trung v\u1ec1 m\u1ed9t h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh. Cho n\u00ean nh\u00ecn v\u00e0o kh\u00f4ng th\u1ea5y b\u00f3ng l\u1ed9n. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c b\u00f4i xi \u0111\u00e1nh gi\u00e0y l\u00e0 \u0111\u1ec3 nh\u1eefng h\u1ea1t li ti trong xi l\u1ea5p v\u00e0o nh\u1eefng ch\u1ed7 tr\u0169ng th\u1ea5p tr\u00ean b\u1ec1 m\u1eb7t gi\u1ea7y da, l\u00e0m cho n\u00f3 tr\u1edf n\u00ean b\u1eb1ng ph\u1eb3ng, v\u00e0 xi \u0111\u00e1nhgi\u00e0y c\u00f3 m\u1ed9t lo\u1ea1i n\u0103ng l\u1ef1c th\u1ea9m th\u1ea5u. N\u00f3 c\u00f3 th\u1ec3 l\u1ea5p k\u00edn m\u1ecdi l\u1ed7 nh\u1ecf, sau \u0111\u00f3 d\u00f9ng v\u1ea3i x\u00e1t l\u00ean \u0111\u1ec3 cho xi \u0111\u01b0\u1ee3c ph\u1ee7 l\u00ean \u0111\u1ec1u kh\u1eafp, t\u00ecnh tr\u1ea1ng th\u00f4 r\u00e1p c\u1ee7a b\u1ec1 m\u1eb7t gi\u1ea7y da \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n l\u00ean nhi\u1ec1u, \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 v\u1ec1 m\u1ed9t h\u01b0\u1edbng n\u00e0o \u0111\u00f3, chi\u1ebfc gi\u00e0y li\u1ec1n b\u00f3ng l\u1ed9n l\u00ean nhi\u1ec1u. Cho n\u00ean sau khi b\u00f4i xi l\u00ean gi\u00e0y, c\u00e0ng x\u00e1t n\u00f3 c\u00e0ng b\u00f3ng l\u00ean.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ph\u1ea3n x\u1ea1 c\u1ee7a \u00e1nh s\u00e1ng. Ph\u1ea3n x\u1ea1 khu\u1ebfch t\u00e1n c\u1ee7a \u00e1nh s\u00e1ng.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
M\u1ed9t \u0111\u00f4i gi\u00e0y da v\u1eeba c\u0169 v\u1eeba b\u1ea9n, ch\u1ec9 c\u1ea7n lau s\u1ea1ch b\u1ee5i b\u1eb7m, b\u00f4i xi \u0111\u00e1nh gi\u1ea7y v\u00e0o, c\u1ea9n th\u1eadn x\u00e1t nh\u1eb9 m\u1ed9t l\u01b0\u1ee3t th\u00ec \u0111\u00f4i gi\u00e0y \u0111\u00e3 v\u1eeba b\u00f3ng v\u1eeba \u0111\u1eb9p m\u1eaft r\u1ed3i. \u0110\u00f3 l\u00e0 v\u00ec l\u00ed do g\u00ec v\u1eady? Th\u00ec ra, \u00e1nh s\u00e1ng chi\u1ebfu t\u1edbi b\u1ea5t c\u1ee9 tr\u00ean b\u1ec1 m\u1eb7t n\u00e0o c\u0169ng […]<\/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-5764","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\/5764","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=5764"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5764\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}