T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 4 – Arkady Leokum<\/p>\n\n\n\n
K\u00ednh thi\u00ean v\u0103n l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u1ec3 c\u00e1c nh\u00e0 thi\u00ean v\u0103n \u1edf m\u1eb7t \u0111\u1ea5t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y v\u00e0 nghi\u00ean c\u1ee9u nh\u1eefng thi\u00ean th\u1ec3 v\u00e0 c\u00e1c ng\u00f4i sao \u1edf c\u00e1ch r\u1ea5t xa tr\u00e1i \u0111\u1ea5t. K\u00ednh thi\u00ean v\u0103n thu \u00e1nh s\u00e1ng ph\u00e1t ra t\u1eeb \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c quan s\u00e1t – m\u1ed9t ng\u00f4i sao ch\u1eb3ng h\u1ea1n. \u00c1nh s\u00e1ng \u1ea5y r\u1ea5t y\u1ebfu \u0111\u1ebfn n\u1ed7i m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c, sau \u0111\u00f3, t\u1eadp trung l\u1ea1i m\u1ed9t \u0111i\u1ec3m nh\u1ecf. T\u1eeb \u0111i\u1ec3m nh\u1ecf n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i ra v\u00e0 gi\u00fap cho nh\u00e0 thi\u00ean v\u0103n nh\u00ecn th\u1ea5y g\u1ea7n h\u01a1n.<\/p>\n\n\n\n
C\u00f3 hai lo\u1ea1i k\u00ednh thi\u00ean v\u0103n ch\u00ednh: lo\u1ea1i \u201ckh\u00fac x\u1ea1\u201d v\u00e0 lo\u1ea1i \u201cph\u1ea3n chi\u1ebfu\u201d. Lo\u1ea1i kh\u00fac x\u1ea1 s\u1eed d\u1ee5ng th\u1ea5u k\u00ednh v\u00e0 lo\u1ea1i ph\u1ea3n chi\u1ebfu th\u00ec d\u00f9ng g\u01b0\u01a1ng \u0111\u1ec3 thu \u00e1nh s\u00e1ng. V\u1edbi lo\u1ea1i \u201ckh\u00fac x\u1ea1\u201d, ng\u01b0\u1eddi quan s\u00e1t nh\u00ecn th\u1eb3ng v\u00e0o k\u00ednh. \u1ede lo\u1ea1i \u201cph\u1ea3n chi\u1ebfu\u201d th\u00ec nh\u00e0 quan s\u00e1t nh\u00ecn nh\u1eefng g\u00ec ph\u1ea3n \u00e1nh tr\u00ean g\u01b0\u01a1ng. \u1ede c\u1ea3 hai lo\u1ea1i k\u00ednh n\u1ebfu nh\u00ecn tr\u1ef1c ti\u1ebfp b\u1eb1ng m\u1eaft th\u01b0\u1eddng th\u00ec ch\u1ec9 th\u1ea5y h\u00ecnh \u1ea3nh b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c. Do \u0111\u00f3 ph\u1ea3i c\u00f3 m\u1ed9t th\u1ea5u k\u00ednh kh\u00e1c n\u1eefa g\u1eafn v\u00e0o ch\u1ed7 m\u1eaft nh\u00ecn \u0111\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c tr\u1edf l\u1ea1i. Tuy nhi\u00ean, n\u1ebfu quan s\u00e1t m\u1ed9t ng\u00f4i sao th\u00ec kh\u00f4ng c\u1ea7n.<\/p>\n\n\n\n
K\u00ednh thi\u00ean v\u0103n kh\u00fac x\u1ea1 l\u00e0 m\u1ed9t kh\u1ed1i h\u00ecnh \u1ed1ng. \u1ede m\u1ed9t \u0111\u1ea7u \u1ed1ng c\u00f3 g\u1eafn \u201cv\u1eadt k\u00ednh\u201d g\u1ed3m hai ho\u1eb7c nhi\u1ec1u h\u01a1n nh\u1eefng th\u1ea5u k\u00ednh. \u00c1nh s\u00e1ng ph\u00e1t ra t\u1eeb \u0111\u1ed1i v\u1eadt \u0111\u01b0\u1ee3c thu l\u1ea1i qua c\u00e1c th\u1ea5u k\u00ednh \u0111\u00f3. \u00c1nh s\u00e1ng n\u00e0y b\u1ecb c\u00e1c th\u1ea5u k\u00ednh \u201ckh\u00fac x\u1ea1\u201d (b\u1ebb g\u00e3y) \u0111\u1ec3 h\u01b0\u1edbng \u00e1nh s\u00e1ng \u0111\u1ebfn m\u1ed9t ti\u00eau \u0111i\u1ec3m (focus) \u0111\u1eb7t \u1edf ph\u1ea7n \u0111\u00e1y \u1ed1ng, n\u01a1i m\u1eaft nh\u00e0 quan s\u00e1t nh\u00ecn v\u00e0o. M\u1ed9t th\u1ea5u k\u00ednh kh\u00e1c s\u1ebd ph\u00f3ng \u0111\u1ea1i h\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i v\u1eadt \u0111\u1ec3 m\u1eaft nh\u00ecn \u0111\u01b0\u1ee3c r\u00f5. Lo\u1ea1i k\u00ednh \u201cph\u1ea3n chi\u1ebfu\u201d ch\u1ec9 c\u1ea7n m\u1ed9t th\u1ea5u k\u00ednh \u0111\u1eb7t \u1edf ch\u1ed7 m\u1eaft nh\u00ecn m\u00e0 th\u00f4i. \u0111\u1ea7u d\u01b0\u1edbi c\u1ee7a \u1ed1ng l\u00e0 m\u1ed9t t\u1ea5m g\u01b0\u01a1ng nh\u01b0 t\u1ea5m g\u01b0\u01a1ng soi c\u1ee7a ta th\u01b0\u1eddng d\u00f9ng nh\u01b0ng h\u01a1i l\u00f5m, tr\u00f2n v\u00e0 gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e1i d\u0129a b\u00e0n l\u1edbn. \u00c1nh s\u00e1ng t\u1eeb ng\u00f4i sao chi\u1ebfu ra \u0111\u01b0\u1ee3c t\u1ea5m g\u01b0\u01a1ng c\u1ee7a \u1ed1ng k\u00ednh thu l\u1ea1i v\u00e0 ph\u1ea3n \u00e1nh v\u00e0o m\u1ed9t ti\u00eau \u0111i\u1ec3m. M\u1ed9t t\u1ea5m g\u01b0\u01a1ng nh\u1ecf h\u01a1n \u0111\u1eb7t t\u1ea1i ti\u00eau \u0111i\u1ec3m n\u00e0y l\u1ea1i ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng (h\u00ecnh \u1ea3nh do t\u1ea5m g\u01b0\u01a1ng r\u1ecdi t\u1edbi) xu\u1ed1ng ch\u1ed7 m\u1eaft nh\u00ecn hay m\u1ed9t m\u00e1y ch\u1ee5p h\u00ecnh \u0111\u1eb7t \u1edf ph\u00eda b\u00ean c\u1ea1nh \u1ed1ng k\u00ednh.<\/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 4 – Arkady Leokum K\u00ednh thi\u00ean v\u0103n l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u1ec3 c\u00e1c nh\u00e0 thi\u00ean v\u0103n \u1edf m\u1eb7t \u0111\u1ea5t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y v\u00e0 nghi\u00ean c\u1ee9u nh\u1eefng thi\u00ean th\u1ec3 v\u00e0 c\u00e1c ng\u00f4i sao \u1edf c\u00e1ch r\u1ea5t xa tr\u00e1i \u0111\u1ea5t. K\u00ednh thi\u00ean v\u0103n thu \u00e1nh […]<\/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-14417","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\/14417","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=14417"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14417\/revisions"}],"predecessor-version":[{"id":14418,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14417\/revisions\/14418"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=14417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=14417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=14417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}