T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 9 – Arkady Leokum<\/p>\n\n\n\n
T\u1eeb \u201claser\u201d \u0111\u01b0\u1ee3c \u0111\u1eb7t ra t\u1eeb nh\u1eefng m\u1eabu t\u1ef1 \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ed9t c\u1ee5m t\u1eeb khoa h\u1ecdc d\u00e0i. Hai m\u1eabu t\u1ef1 \u0111\u1ea7u ti\u00ean l\u00e0 \u201cs\u1ef1 khu\u1ebfch \u0111\u1ea1i \u00e1nh s\u00e1ng\u201d (Light Amplication). Ba m\u1eabu t\u1ef1 s, e, r l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a c\u1ee5m t\u1eeb \u201cph\u00e1t \u0111\u1ed9ng s\u1ef1 b\u1ee9c x\u1ea1 do k\u00edch th\u00edch\u201d (Stimulated Emission of Radiation).<\/p>\n\n\n\n
Nh\u01b0 v\u1eady tia laser khu\u1ebfch \u0111\u1ea1i \u00e1nh s\u00e1ng. Tia laser c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i m\u1ed9t tia s\u00e1ng y\u1ebfu th\u00e0nh m\u1ed9t tia s\u00e1ng m\u1ea1nh. V\u00ec th\u1ebf nh\u1eefng tia la- ser c\u00f3 th\u1ec3 t\u1ea1o n\u00ean nh\u1eefng tia s\u00e1ng c\u1ef1c m\u1ea1nh, khi ch\u00fang \u0111\u01b0\u1ee3c t\u1eadp h\u1ee3p l\u1ea1i v\u1edbi nhau, c\u00f3 th\u1ec3 xuy\u00ean th\u1ee7ng nh\u1eefng l\u1ed7 nh\u1ecf li ti tr\u00ean m\u1ed9t mi\u1ebfng th\u00e9p ch\u01b0a \u0111\u1ebfn m\u1ed9t gi\u00e2y.<\/p>\n\n\n\n
Tia laser c\u00f3 th\u1ec3 v\u01b0\u1ee3t nh\u1eefng kho\u1ea3ng c\u00e1ch r\u1ea5t xa trong kh\u00f4ng gian m\u00e0 ch\u1eb3ng c\u1ea7n du\u1ed7i ra hay thu ng\u1eafn l\u1ea1i. Do \u0111\u00f3, ch\u00fang tr\u1edf th\u00e0nh m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng trong th\u1eddi \u0111\u1ea1i kh\u00f4ng gian. \u0110\u1ed1i v\u1edbi tia laser, ng\u01b0\u1eddi ta \u0111\u00e3 t\u00ecm th\u1ea5y nhi\u1ec1u c\u00e1ch s\u1eed d\u1ee5ng cho y h\u1ecdc, khoa h\u1ecdc v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n\n\n\n
C\u00e1c nh\u00e0 khoa h\u1ecdc ngh\u0129 r\u1eb1ng \u00e1nh s\u00e1ng c\u0169ng di chuy\u1ec3n theo d\u1ea1ng s\u00f3ng. Kho\u1ea3ng c\u00e1ch t\u1eeb \u0111\u1ec9nh n\u00e0y \u0111\u1ebfn \u0111\u1ec9nh kia c\u1ee7a s\u00f3ng \u00e1nh s\u00e1ng g\u1ecdi l\u00e0 \u0111\u1ed9 d\u00e0i s\u00f3ng. \u00c1nh s\u00e1ng t\u1eeb m\u1eb7t tr\u1eddi hay t\u1eeb ng\u1ecdn \u0111\u00e8n l\u00e0 m\u1ed9t h\u1ed7n h\u1ee3p c\u1ee7a nhi\u1ec1u \u0111\u1ed9 d\u00e0i s\u00f3ng. M\u1ed7i \u0111\u1ed9 d\u00e0i s\u00f3ng kh\u00e1c nhau cho m\u1ed9t m\u00e0u s\u1eafc kh\u00e1c nhau.<\/p>\n\n\n\n
Ch\u00f9m tia laser \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean b\u1edfi nh\u1eefng tia s\u00e1ng ch\u00ednh x\u00e1c c\u00f3 c\u00f9ng \u0111\u1ed9 d\u00e0i s\u00f3ng. Nh\u1eefng tia s\u00e1ng trong ch\u00f9m \u00e1nh s\u00e1ng b\u00ecnh th\u01b0\u1eddng di chuy\u1ec3n theo nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau. Nh\u1eefng tia s\u00e1ng c\u1ee7a ch\u00f9m laser di chuy\u1ec3n ch\u00ednh x\u00e1c theo m\u1ed9t h\u01b0\u1edbng m\u00e0 th\u00f4i. Tia laser kh\u00f4ng lan r\u1ed9ng m\u00e0 c\u0169ng kh\u00f4ng y\u1ebfu \u0111i.<\/p>\n\n\n\n
T\u1ea5t c\u1ea3 c\u00e1c tia s\u00e1ng c\u1ee7a ch\u00f9m tia laser \u0111\u1ec1u c\u00f3 c\u00f9ng b\u01b0\u1edbc s\u00f3ng. Ngh\u0129a l\u00e0, \u0111\u1ec9nh c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c s\u00f3ng c\u1ee7a t\u1ea5t c\u1ea3 tia s\u00e1ng \u0111\u1ec1u tr\u00f9ng nhau. Khi nh\u1eefng tia s\u00e1ng \u0111\u1ed3ng b\u01b0\u1edbc nh\u01b0 th\u1ebf, ch\u00fang t\u0103ng l\u1ef1c cho nhau. Do \u0111\u00f3, tia laser c\u1ef1c k\u1ef3 m\u1ea1nh. Tia laser l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nh\u1eefng tia s\u00e1ng y\u1ebfu \u1edbt nh\u01b0ng c\u00f3 c\u00f9ng m\u1ed9t b\u01b0\u1edbc s\u00f3ng \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t ch\u00f9m tia.<\/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 9 – Arkady Leokum T\u1eeb \u201claser\u201d \u0111\u01b0\u1ee3c \u0111\u1eb7t ra t\u1eeb nh\u1eefng m\u1eabu t\u1ef1 \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ed9t c\u1ee5m t\u1eeb khoa h\u1ecdc d\u00e0i. Hai m\u1eabu t\u1ef1 \u0111\u1ea7u ti\u00ean l\u00e0 \u201cs\u1ef1 khu\u1ebfch \u0111\u1ea1i \u00e1nh s\u00e1ng\u201d (Light Amplication). Ba m\u1eabu t\u1ef1 s, e, r l\u00e0 vi\u1ebft […]<\/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-15521","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\/15521","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=15521"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15521\/revisions"}],"predecessor-version":[{"id":15522,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15521\/revisions\/15522"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=15521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=15521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=15521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}