Mu\u1ed1n nh\u00ecn r\u00f5 c\u1ea3nh v\u1eadt trong t\u1ed1i \u0111en, ch\u1ec9 d\u1ef1a v\u00e0o m\u1eaft th\u01b0\u1eddng th\u00ec v\u00f4 c\u00f9ng kh\u00f3 kh\u0103n. Song nh\u1edd v\u00e0o m\u00e1y nh\u00ecn \u0111\u00eam th\u00ec d\u00f9 kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t ch\u00fat tia s\u00e1ng y\u1ebfu \u1edbt, v\u1eabn c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u1ea3nh v\u1eadt r\u00f5 m\u1ed3n m\u1ed9t trong t\u00ecnh tr\u1ea1ng nh\u01b0 v\u1eady. M\u00e1y nh\u00ecn \u0111\u00eam th\u01b0\u1eddng d\u00f9ng c\u00f3 hai lo\u1ea1i: m\u00e1y nh\u00ecn \u0111\u00eam \u00e1nh s\u00e1ng y\u1ebfu v\u00e0 m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i.<\/p>\n\n\n\n
Trong \u0111\u00eam t\u1ed1i, ch\u1ec9 c\u1ea7n c\u00f3 m\u1ed9t ch\u00fat \u00e1nh tr\u0103ng sao l\u1edd m\u1edd, b\u00f3ng t\u0103ng \u1ea3nh trong m\u00e1y nh\u00ecn \u0111\u00eam vi quang (\u00e1nh s\u00e1ng y\u1ebfu \u1edbt), th\u00f4ng qua chuy\u1ec3n \u0111\u1ed5i quang \u0111i\u1ec7n v\u00e0 ph\u00f3ng \u0111\u1ea1i, c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng tia s\u00e1ng y\u1ebfu \u1edbt, ph\u1ea3n x\u1ea1 t\u1eeb c\u1ea3nh v\u1eadt ra. B\u00f3ng t\u0103ng \u1ea3nh do t\u1ea5m ph\u00f3ng \u0111\u1ea1i ba c\u1ea5p h\u1ee3p th\u00e0nh, kh\u1ea3 n\u0103ng ph\u00f3ng \u0111\u1ea1i c\u00f3 th\u1ec3 t\u1edbi m\u1ed9t tri\u1ec7u l\u1ea7n, \u0111\u1ee7 \u0111\u1ec3 t\u00e1i hi\u1ec7n c\u1ea3nh v\u1eadt trong m\u00f4i tr\u01b0\u1eddng \u00e1nh s\u00e1ng y\u1ebfu \u1edbt r\u00f5 m\u1ed3n m\u1ed9t.<\/p>\n\n\n\n
Trong t\u00ecnh tr\u1ea1ng ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng th\u00ec m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i l\u1ea1i r\u1ea5t c\u00f3 t\u00e1c d\u1ee5ng.<\/p>\n\n\n\n
Tia h\u1ed3ng ngo\u1ea1i kh\u00f4ng ph\u1ea3i l\u00e0 \u00e1nh s\u00e1ng nh\u00ecn th\u1ea5y, m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ea5y \u0111\u01b0\u1ee3c, nh\u01b0ng c\u0169ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u00e1nh s\u00e1ng. C\u00e1c lo\u1ea1i v\u1eadt th\u1ec3 trong gi\u1edbi t\u1ef1 nhi\u00ean, c\u00f3 nhi\u1ec7t \u0111\u1ed9 t\u1eeb kh\u00f4ng \u0111\u1ed9 nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc tr\u1edf l\u00ean (t\u1ee9c l\u00e0 \u2013273,15\u00b0C tr\u1edf l\u00ean), \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ee9c x\u1ea1 ra tia h\u1ed3ng ngo\u1ea1i. B\u00f3ng bi\u1ebfn \u1ea3nh tia h\u1ed3ng ngo\u1ea1i trong m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i c\u00f3 th\u1ec3 ti\u1ebfp nh\u1eadn tia h\u1ed3ng ngo\u1ea1i, th\u00f4ng qua chuy\u1ec3n \u0111\u1ed5i quang \u0111i\u1ec7n v\u00e0 ph\u00f3ng \u0111\u1ea1i \u0111\u1ec3 cho c\u1ea3nh v\u1eadt hi\u1ec7n r\u00f5 ra. \u0110\u00f3 l\u00e0 lo\u1ea1i m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i ki\u1ec3u th\u1ee5 \u0111\u1ed9ng, ph\u1ea3i d\u1ef1a v\u00e0o tia h\u1ed3ng ngo\u1ea1i c\u1ee7a b\u1ea3n th\u00e2n c\u1ea3nh v\u1eadt b\u1ee9c x\u1ea1 ra m\u1edbi c\u00f3 th\u1ec3 th\u1ea5y r\u00f5 c\u1ea3nh v\u1eadt trong t\u1ed1i \u0111en. C\u00f2n c\u00f3 m\u1ed9t lo\u1ea1i m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i ch\u1ee7 \u0111\u1ed9ng. N\u00f3 c\u00f3 th\u1ec3 ph\u00e1t ra tia h\u1ed3ng ngo\u1ea1i, r\u1ed3i l\u1ea1i thu nh\u1eadn tia h\u1ed3ng ngo\u1ea1i ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i t\u1eeb c\u1ea3nh v\u1eadt. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 n\u00e2ng cao r\u00f5 r\u1ec7t \u0111\u1ed9 r\u00f5 n\u00e9t c\u1ee7a c\u1ea3nh v\u1eadt.<\/p>\n\n\n\n
M\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i c\u0169ng c\u00f3 th\u1ec3 soi “th\u1ea5y” kh\u00f4ng l\u1ea7m l\u1eabn trong m\u00f4i tr\u01b0\u1eddng s\u01b0\u01a1ng m\u00f9 d\u00e0y \u0111\u1eb7c, t\u1ea7m nh\u00ecn r\u1ea5t g\u1ea7n, v\u00ec r\u1eb1ng tia h\u1ed3ng ngo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng xuy\u00ean th\u1ea5u kh\u00e1 m\u1ea1nh, c\u00f3 th\u1ec3 truy\u1ec1n t\u1edbi kho\u1ea3ng c\u00e1ch r\u1ea5t xa. C\u00f3 \u0111\u01b0\u1ee3c m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i, kh\u00f4ng b\u1eadt \u0111\u00e8n pha, ng\u01b0\u1eddi l\u00e1i xe c\u0169ng c\u00f3 th\u1ec3 cho \u00f4 t\u00f4 ch\u1ea1y nhanh trong \u0111\u00eam t\u1ed1i. V\u1ec1 m\u1eb7t trinh s\u00e1t qu\u00e2n s\u1ef1, ph\u00f2ng ch\u1ed1ng t\u1ed9i ph\u1ea1m c\u1ee7a c\u00f4ng an v\u00e0 quan s\u00e1t \u0111\u1ed9ng, th\u1ef1c v\u1eadt trong t\u1ed1i \u0111en, m\u00e1y nh\u00ecn \u0111\u00eam tia h\u1ed3ng ngo\u1ea1i c\u00e0ng c\u00f3 c\u00f4ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: M\u00e1y nh\u00ecn \u0111\u00eam; Tia h\u1ed3ng ngo\u1ea1i; B\u00f3ng t\u0103ng \u1ea3nh.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Mu\u1ed1n nh\u00ecn r\u00f5 c\u1ea3nh v\u1eadt trong t\u1ed1i \u0111en, ch\u1ec9 d\u1ef1a v\u00e0o m\u1eaft th\u01b0\u1eddng th\u00ec v\u00f4 c\u00f9ng kh\u00f3 kh\u0103n. Song nh\u1edd v\u00e0o m\u00e1y nh\u00ecn \u0111\u00eam th\u00ec d\u00f9 kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t ch\u00fat tia s\u00e1ng y\u1ebfu \u1edbt, v\u1eabn c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u1ea3nh v\u1eadt r\u00f5 m\u1ed3n m\u1ed9t trong t\u00ecnh tr\u1ea1ng nh\u01b0 v\u1eady. M\u00e1y […]<\/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-5876","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\/5876","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=5876"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5876\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}