C\u00e1c nh\u00e2n vi\u00ean l\u00e0m vi\u1ec7c trong \u0111\u00eam t\u1ed1i r\u1ea5t th\u00edch d\u00f9ng \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang \u0111eo tay. C\u00e1c \u0111\u1ed3ng h\u1ed3 n\u00e0y ph\u00e1t \u00e1nh s\u00e1ng hu\u1ef3nh quang m\u00e0u xanh gi\u00fap cho ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 bi\u1ebft ch\u00ednh x\u00e1c th\u1eddi gian trong \u0111\u00eam. T\u1ea1i sao \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang l\u1ea1i ph\u00e1t s\u00e1ng v\u00e0o ban \u0111\u00eam?<\/p>\n\n\n\n
\u0110\u00f3 l\u00e0 do tr\u00ean \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang, c\u00e1c ch\u1eef s\u1ed1, kim \u0111\u1ed3ng h\u1ed3 \u0111\u01b0\u1ee3c s\u01a1n m\u1ed9t h\u1ee3p ch\u1ea5t nh\u01b0 k\u1ebdm sunfua, ho\u1eb7c canxi sunfua l\u00e0 nh\u1eefng ch\u1ea5t c\u00f3 th\u1ec3 ph\u00e1t ra \u00e1nh s\u00e1ng. K\u1ebdm sunfua v\u00e0 canxi sunfua l\u00e0 nh\u1eefng ch\u1ea5t b\u1ed9t m\u00e0u tr\u1eafng. C\u00e1c h\u1ee3p ch\u1ea5t n\u00e0y s\u1ebd h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng khi \u0111\u01b0\u1ee3c chi\u1ebfu s\u00e1ng do \u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi. Khi kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi, c\u00e1c h\u1ee3p ch\u1ea5t n\u00e0y l\u1ea1i c\u00f3 th\u1ec3 ph\u00e1t ra \u00e1nh s\u00e1ng hu\u1ef3nh quang m\u00e0u l\u1ee5c. \u00c1nh s\u00e1ng hu\u1ef3nh quang kh\u00f4ng h\u1ec1 c\u00f3 nhi\u1ec7t l\u01b0\u1ee3ng, n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e1nh s\u00e1ng l\u1ea1nh. Ch\u1ec9 c\u00f3 \u0111i\u1ec1u \u0111\u00e1ng ti\u1ebfc l\u00e0 sau khi m\u1ea5t ngu\u1ed3n s\u00e1ng chi\u1ebfu x\u1ea1 m\u1ed9t th\u1eddi gian, \u00e1nh s\u00e1ng hu\u1ef3nh quang s\u1ebd y\u1ebfu d\u1ea7n v\u00e0 cu\u1ed1i c\u00f9ng bi\u1ebfn m\u1ea5t. S\u1edf d\u0129 l\u1edbp s\u01a1n tr\u00ean ch\u1eef s\u1ed1, kim \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang c\u00f3 th\u1ec3 ph\u00e1t s\u00e1ng li\u00ean t\u1ee5c l\u00e0 nh\u1edd c\u00f3 th\u00eam m\u1ed9t \u00edt ch\u1ea5t ph\u00f3ng x\u1ea1. V\u00ed d\u1ee5 cacbon C – 14, l\u01b0u hu\u1ef3nh S – 35, stronti Sr – 90, tali Tl – 204 c\u0169ng nh\u01b0 radi, p\u00f4l\u00f4ni ho\u1eb7c c\u00e1c \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 kh\u00e1c. C\u00e1c \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 kh\u00f4ng ng\u1eebng ph\u00e1t m\u1ed9t l\u01b0\u1ee3ng r\u1ea5t \u00edt n\u0103ng l\u01b0\u1ee3ng, m\u1eaft th\u01b0\u1eddng kh\u00f4ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng c\u00e1c tia ph\u00f3ng x\u1ea1. D\u01b0\u1edbi t\u00e1c d\u1ee5ng k\u00edch th\u00edch c\u1ee7a c\u00e1c tia ph\u00f3ng x\u1ea1, k\u1ebdm sunfua v\u00e0 canxi sunfua c\u00f3 th\u1ec3 ph\u00e1t ra \u00e1nh s\u00e1ng l\u1ea1nh m\u00e0u l\u1ee5c. \u0110\u1ec3 t\u0103ng cao kh\u1ea3 n\u0103ng ph\u00e1t \u00e1nh s\u00e1ng l\u1ea1nh ng\u01b0\u1eddi ta th\u00eam v\u00e0o lo\u1ea1i ch\u1ea5t ph\u00e1t quang \u0111\u00e3 k\u1ec3 tr\u00ean c\u00e1c ch\u1ea5t k\u00edch ho\u1ea1t. V\u00ed d\u1ee5 ng\u01b0\u1eddi ta th\u00eam v\u00e0o ch\u1ea5t ph\u00e1t quang h\u00e0m l\u01b0\u1ee3ng \u0111\u1ed3ng clorua ho\u1eb7c \u0111\u1ed3ng nitrat, nh\u1edd \u0111\u00f3 c\u01b0\u1eddng \u0111\u1ed9 ph\u00e1t quang c\u00f3 th\u1ec3 t\u0103ng l\u00ean nhi\u1ec1u l\u1ea7n. C\u00f3 \u0111i\u1ec1u l\u00fd th\u00fa l\u00e0 n\u1ebfu thay ch\u1ea5t k\u00edch ho\u1ea1t b\u1eb1ng m\u1ed9t \u00edt l\u01b0\u1ee3ng mangan clorua ho\u1eb7c b\u1ea1c nitrat th\u00ec \u00e1nh s\u00e1ng ph\u00e1t quang s\u1ebd c\u00f3 m\u00e0u da cam ho\u1eb7c m\u00e0u lam.<\/p>\n\n\n\n
\u0110\u1ed3ng h\u1ed3 d\u1ea1 quang ch\u1ec9 l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng nh\u1ecf ch\u1ea5t ph\u00e1t quang v\u00e0o c\u00e1c m\u1ee5c \u0111\u00edch th\u1ef1c ti\u1ec5n. Ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u0111\u01b0a ch\u1ea5t ph\u00e1t quang v\u00e0o ch\u1ea5t d\u1ebbo \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c lo\u1ea1i ch\u1ea5t d\u1ebbo ph\u00e1t quang \u0111\u1ec3 hi\u1ec7n h\u00ecnh c\u00e1c \u0111\u1ed3 \u0111i\u1ec7n gia d\u1ee5ng v\u00e0o ban \u0111\u00eam. V\u00ed d\u1ee5 \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c c\u00f4ng t\u1eafc \u0111i\u1ec7n, v\u1ecb tr\u00ed \u0111\u1ec3 \u0111i\u1ec7n tho\u1ea1i\u2026 Ng\u01b0\u1eddi ta c\u0169ng \u0111\u01b0a ch\u1ea5t ph\u00e1t quang v\u00e0o g\u1ed1m, th\u1ee7y tinh, s\u01a1n d\u1ea7u\u2026. \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c v\u1eadt d\u1ee5ng c\u1ea7n thi\u1ebft. C\u00f3 \u0111\u01b0\u1ee3c s\u1ef1 gi\u00fap \u0111\u1ee1 c\u1ee7a ch\u1ea5t ph\u00e1t quang l\u00e0m m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng d\u1ec5 d\u00e0ng trong \u0111\u00eam t\u1ed1i.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: V\u1eadt li\u1ec7u ph\u00e1t quang; \u00e1nh s\u00e1ng l\u1ea1nh.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c nh\u00e2n vi\u00ean l\u00e0m vi\u1ec7c trong \u0111\u00eam t\u1ed1i r\u1ea5t th\u00edch d\u00f9ng \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang \u0111eo tay. C\u00e1c \u0111\u1ed3ng h\u1ed3 n\u00e0y ph\u00e1t \u00e1nh s\u00e1ng hu\u1ef3nh quang m\u00e0u xanh gi\u00fap cho ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 bi\u1ebft ch\u00ednh x\u00e1c th\u1eddi gian trong \u0111\u00eam. T\u1ea1i sao \u0111\u1ed3ng h\u1ed3 d\u1ea1 quang l\u1ea1i ph\u00e1t s\u00e1ng v\u00e0o ban \u0111\u00eam? \u0110\u00f3 l\u00e0 […]<\/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":[8,15],"tags":[],"class_list":["post-8004","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8004","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=8004"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8004\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}