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
Khi khoa h\u1ecdc b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n, c\u00e1ch \u0111\u00e2y v\u00e0i tr\u0103m n\u0103m, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 b\u0103n kho\u0103n v\u1edbi s\u1ef1 \u0111o l\u01b0\u1eddng.<\/p>\n\n\n\n
Ti\u00eau chu\u1ea9n thay \u0111\u1ed5i t\u1eeb n\u01b0\u1edbc n\u00e0y \u0111\u1ebfn n\u01b0\u1edbc kh\u00e1c v\u00e0 th\u1eadm ch\u00ed ngay trong c\u00f9ng m\u1ed9t n\u01b0\u1edbc. V\u00ec v\u1eady trong su\u1ed1t th\u1eadp ni\u00ean 1700, c\u00e1c nh\u00e0 khoa h\u1ecdc th\u1ea3o lu\u1eadn v\u1ec1 m\u1ed9t h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng d\u1ec5 hi\u1ec3u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3 th\u1ebf gi\u1edbi ch\u1ea5p thu\u1eadn.<\/p>\n\n\n\n
H\u1ec7 th\u1ed1ng \u1ea5y \u0111\u01b0\u1ee3c ph\u00e1t minh \u1edf Ph\u00e1p n\u0103m 1791. Ng\u01b0\u1eddi Ph\u00e1p c\u00f3 nh\u1eefng l\u00fd do \u0111\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u1ea5y. H\u1ecd v\u1eeba m\u1edbi \u1edf gi\u1eefa th\u1eddi k\u1ef3 c\u00e1ch m\u1ea1ng. Nh\u1eefng nh\u00e0 l\u00e3nh \u0111\u1ea1o cu\u1ed9c c\u00e1ch m\u1ea1ng mu\u1ed1n tr\u00fat b\u1ecf nh\u1eefng \u0111i\u1ec1u nh\u1eafc nh\u1edf v\u1ec1 m\u1ed9t qu\u00e1 kh\u1ee9 \u0111\u00e1ng gh\u00e9t. V\u00ec th\u1ebf h\u1ecd mu\u1ed1n thi\u1ebft l\u1eadp m\u1ed9t h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng m\u1edbi.<\/p>\n\n\n\n
H\u1ecd b\u1eaft \u0111\u1ea7u v\u1edbi chi\u1ec1u d\u00e0i. H\u1ecd quy\u1ebft \u0111\u1ecbnh thi\u1ebft l\u1eadp \u201cm\u00e9t\u201d (do m\u1ed9t t\u1eeb La tinh c\u00f3 ngh\u0129a l\u00e0 \u0111o \u0111\u1ea1c) l\u00e0m ti\u00eau chu\u1ea9n. To\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng m\u1edbi \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ec7 th\u1ed1ng th\u1eadp ph\u00e2n. Kh\u1edfi th\u1ee7y h\u1ecd c\u1ed1 g\u1eafng l\u00e0m cho \u0111\u01a1n v\u1ecb m\u00e9t (th\u01b0\u1edbc) \u0111\u00fang v\u1edbi 1\/40.000.000 c\u1ee7a chu vi tr\u00e1i \u0111\u1ea5t. Nh\u01b0ng khi t\u00ednh to\u00e1n, m\u1edbi hay l\u00e0 n\u00f3 sai v\u1edbi chu vi c\u1ee7a tr\u00e1i \u0111\u1ea5t, v\u00ec c\u00e1i th\u01b0\u1edbc c\u1ee7a h\u1ecd l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m c\u1ee7a m\u1ed9t thanh platinum-iridium. T\u1ea5t c\u1ea3 \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng theo h\u1ec7 th\u1ed1ng n\u00e0y, chi\u1ec1u d\u00e0i, th\u1ec3 t\u00edch, kh\u1ed1i l\u01b0\u1ee3ng – \u0111\u1ec1u \u00edt nhi\u1ec1u li\u00ean h\u1ec7 \u0111\u1ebfn m\u00e9t.<\/p>\n\n\n\n
Th\u1eadt v\u1eady, h\u1ec7 th\u1ed1ng th\u1eadp ph\u00e2n r\u1ea5t d\u1ec5 nh\u1edb v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng. M\u1eb7c d\u1ea7u \u0111\u1ea7u ti\u00ean ng\u01b0\u1eddi ta kh\u00f4ng mu\u1ed1n thay \u0111\u1ed5i. N\u0103m 1840, ch\u00ednh ph\u1ee7 Ph\u00e1p ph\u1ea3i c\u01b0\u01a1ng quy\u1ebft khuy\u1ebfn c\u00e1o ng\u01b0\u1eddi d\u00e2n s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng th\u1eadp ph\u00e2n, n\u1ebfu kh\u00f4ng s\u1ebd b\u1ecb x\u1eed ph\u1ea1t.<\/p>\n\n\n\n
C\u00e1c qu\u1ed1c gia kh\u00e1c d\u1ea7n d\u1ea7n ch\u1ea5p nh\u1eadn h\u1ec7 th\u1ed1ng th\u1eadp ph\u00e2n v\u00e0 ng\u00e0y nay h\u1ea7u nh\u01b0 to\u00e0n th\u1ebf gi\u1edbi \u0111\u1ec1u d\u00f9ng n\u00f3.<\/p>\n\n\n\n
V\u01b0\u01a1ng qu\u1ed1c Anh ng\u00e0y nay \u201c\u0111ang t\u1eebng b\u01b0\u1edbc du nh\u1eadp\u201d h\u1ec7 th\u1ed1ng n\u00e0y.<\/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 Khi khoa h\u1ecdc b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n, c\u00e1ch \u0111\u00e2y v\u00e0i tr\u0103m n\u0103m, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 b\u0103n kho\u0103n v\u1edbi s\u1ef1 \u0111o l\u01b0\u1eddng. Ti\u00eau chu\u1ea9n thay \u0111\u1ed5i t\u1eeb n\u01b0\u1edbc n\u00e0y \u0111\u1ebfn n\u01b0\u1edbc kh\u00e1c v\u00e0 th\u1eadm ch\u00ed ngay trong c\u00f9ng […]<\/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-15559","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\/15559","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=15559"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15559\/revisions"}],"predecessor-version":[{"id":15560,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15559\/revisions\/15560"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=15559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=15559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=15559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}