T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum<\/p>\n\n\n\n
Ch\u00fang ta th\u01b0\u1eddng li\u00ean k\u1ebft \u00e1nh s\u00e1ng v\u00e0 nhi\u1ec7t: l\u1eeda, n\u1ebfn, m\u1eb7t tr\u1eddi. C\u00e1c b\u00f3ng \u0111\u00e8n tr\u00f2n s\u00e1ng ti\u00eau chu\u1ea9n n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c \u201cb\u00f3ng \u0111\u00e8n nhi\u1ec7t\u201d th\u00ec th\u00edch h\u1ee3p h\u01a1n, b\u1edfi v\u00ec 90% \u0111i\u1ec7n n\u0103ng chuy\u1ec3n cho ch\u00fang \u0111\u01b0\u1ee3c bi\u1ebfn th\u00e0nh nhi\u1ec7t.<\/p>\n\n\n\n
Tuy nhi\u00ean, c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch \u0111\u1ec3 sinh ra \u00e1nh s\u00e1ng m\u00e0 kh\u00f4ng c\u1ea7n nhi\u1ec7t, v\u00e0 ch\u00fang ho\u1ea1t \u0111\u1ed9ng d\u1ef1a v\u00e0o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c h\u01a1n l\u00e0 nhi\u1ec7t \u0111\u1ec3 bu\u1ed9c c\u00e1c electron nh\u1ea3y l\u00ean c\u00e1c m\u1ee9c n\u0103ng l\u01b0\u1ee3ng cao h\u01a1n \u1edf trong nguy\u00ean t\u1eed, t\u1eeb \u0111\u00f3 ch\u00fang r\u01a1i xu\u1ed1ng tr\u1edf l\u1ea1i, ph\u00e1t ra n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang d\u01b0\u1edbi d\u1ea1ng \u00e1nh s\u00e1ng. N\u00f3i chung, c\u00e1c qu\u00e1 tr\u00ecnh nh\u01b0 v\u1eady \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ef1 ph\u00e1t quang, v\u00e0 trong \u0111\u1ecbnh ngh\u0129a r\u1ed9ng \u0111\u00f3 c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch \u0111\u1ec3 sinh ra \u00e1nh s\u00e1ng l\u1ea1nh. V\u00ed d\u1ee5, c\u00e1c h\u1ee3p ch\u1ea5t hu\u1ef3nh quang s\u1ebd b\u00f9ng ph\u00e1t \u00e1nh s\u00e1ng m\u1ed9t l\u00e1t n\u1ebfu \u0111\u01b0\u1ee3c k\u00edch th\u00edch th\u00edch h\u1ee3p nh\u01b0ng ph\u1ea3i c\u1ea7n c\u00f3 s\u1ef1 k\u00edch th\u00edch li\u00ean t\u1ee5c \u0111\u1ec3 ti\u1ebfp t\u1ee5c s\u00e1ng.<\/p>\n\n\n\n
Nh\u1eefng con s\u1ed1 ph\u00e1t s\u00e1ng tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111eo tay tr\u01b0\u1edbc \u0111\u00e2y c\u0169ng v\u1eady: ch\u00fang s\u1eed d\u1ee5ng c\u00e1c h\u1ee3p ch\u1ea5t nh\u01b0 k\u1ebdm sulphide, ch\u1ea5t m\u00e0 s\u1ef1 hu\u1ef3nh quang t\u01b0\u01a1ng \u0111\u1ed1i ng\u1eafn c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c sinh ra b\u1edfi s\u1ef1 ph\u00e2n r\u00e3 ph\u00f3ng x\u1ea1 c\u1ee7a radium (ch\u1ea5t n\u00e0y \u0111\u00e3 d\u1eabn t\u1edbi c\u00e1i ch\u1ebft c\u1ee7a nhi\u1ec1u ng\u01b0\u1eddi th\u1ee3 l\u00e0m con s\u1ed1). C\u00e1c \u0111\u1ed3ng h\u1ed3 ph\u00e1t s\u00e1ng ng\u00e0y nay s\u1eed d\u1ee5ng c\u00e1c h\u1ee3p ch\u1ea5t \u201c\u0111\u1ea5t hi\u1ebfm\u201d nh\u01b0 europium, c\u00e1c electron trong europium ph\u1ea3n \u1ee9ng l\u1ea1i v\u1edbi \u00e1nh s\u00e1ng ban ng\u00e0y th\u00f4ng th\u01b0\u1eddng r\u1ed3i ph\u00e1t ra \u00e1nh s\u00e1ng l\u1ea1nh s\u00e1ng m\u1ed9t c\u00e1ch k\u00ec l\u1ea1 trong su\u1ed1t \u0111\u00eam d\u00e0i.<\/p>\n\n\n\n
C\u0169ng nh\u01b0 b\u00ecnh th\u01b0\u1eddng, thi\u00ean nhi\u00ean l\u1ea1i chi\u1ebfn th\u1eafng: c\u00f3 r\u1ea5t nhi\u1ec1u sinh v\u1eadt nh\u01b0 c\u00e1 v\u00e0 \u0111om \u0111\u00f3m \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c h\u00f3a ch\u1ea5t m\u00e0 c\u00f3 th\u1ec3 ph\u00e1t ra \u00e1nh s\u00e1ng l\u1ea1nh v\u1edbi hi\u1ec7u qu\u1ea3 th\u1eadt \u1ea5n t\u01b0\u1ee3ng. Ngay c\u1ea3 m\u1ed9t v\u00e0i lo\u1ea1i n\u1ea5m c\u0169ng l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, t\u1ea1o ra m\u00e0u s\u1eafc r\u1ef1c r\u1ee1 \u0111\u00e1ng s\u1ee3 khi ch\u00fang \u0111ang ph\u00e2n h\u1ee7y \u1edf trong r\u1eebng, ngay gi\u1eefa \u0111\u00eam khuya.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum Ch\u00fang ta th\u01b0\u1eddng li\u00ean k\u1ebft \u00e1nh s\u00e1ng v\u00e0 nhi\u1ec7t: l\u1eeda, n\u1ebfn, m\u1eb7t tr\u1eddi. C\u00e1c b\u00f3ng \u0111\u00e8n tr\u00f2n s\u00e1ng ti\u00eau chu\u1ea9n n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c \u201cb\u00f3ng \u0111\u00e8n nhi\u1ec7t\u201d th\u00ec th\u00edch h\u1ee3p h\u01a1n, b\u1edfi v\u00ec 90% \u0111i\u1ec7n n\u0103ng chuy\u1ec3n cho […]<\/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],"tags":[],"class_list":["post-16453","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16453","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=16453"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16453\/revisions"}],"predecessor-version":[{"id":16454,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16453\/revisions\/16454"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=16453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=16453"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=16453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}