Nh\u00e0 khoa h\u1ecdc Kran, ng\u01b0\u1eddi \u0110\u1ee9c, \u0111\u01b0\u1ee3c t\u00f4n vinh l\u00e0 ng\u01b0\u1eddi cha c\u1ee7a \u00e2m h\u1ecdc c\u1ed5 \u0111i\u1ec3n, c\u00f3 m\u1ed9t th\u1eddi r\u1ea5t say m\u00ea nghi\u00ean c\u1ee9u nguy\u00ean l\u00ed ph\u00e1t \u00e2m c\u1ee7a nh\u1ea1c c\u1ee5 d\u00e2y. \u0110\u1ec3 kh\u00e1m ph\u00e1 quy lu\u1eadt rung \u0111\u1ed9ng c\u1ee7a v\u00e1n \u0111\u00e0n vi\u00f4l\u00f4ng, \u00f4ng \u0111\u00e3 l\u00e0m m\u1ed9t lo\u1ea1t c\u00e1c th\u00ed nghi\u1ec7m l\u00ed th\u00fa, t\u1eeb t\u1ea5m ph\u1eb3ng h\u00ecnh vu\u00f4ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t tr\u1edf \u0111i. L\u1ea5y m\u1ed9t t\u1ea5m kim lo\u1ea1i ph\u1eb3ng h\u00ecnh vu\u00f4ng, ch\u1ed1t ch\u1eb7t \u1edf gi\u1eefa l\u1ea1i v\u00e0 r\u1eafc \u0111\u1ec1u m\u1ed9t l\u1edbp c\u00e1t m\u1ecbn l\u00ean tr\u00ean \u0111\u00f3. \u00d4ng d\u00f9ng ng\u00f3n tay t\u00ec v\u00e0o m\u1ed9t \u0111i\u1ec3m ho\u1eb7c hai \u0111i\u1ec3m \u1edf m\u1ed9t c\u1ea1nh c\u1ee7a t\u1ea5m kim lo\u1ea1i, c\u00f2n tay kia d\u00f9ng c\u00e1i v\u0129 \u0111\u00e3 \u0111\u01b0\u1ee3c thoa nh\u1ef1a colophan c\u1ecd x\u00e1t m\u1ea1nh t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi v\u00e0o c\u1ea1nh g\u1ea7n k\u1ec1, l\u00e0m cho t\u1ea5m kim lo\u1ea1i rung \u0111\u1ed9ng. M\u1ed7i l\u1ea7n c\u1ecd x\u00e1t xong th\u00ec r\u1eddi c\u00e1i v\u0129 ra kh\u1ecfi t\u1ea5m kim lo\u1ea1i ngay, r\u1ed3i l\u1ea1i ti\u1ebfp t\u1ee5c c\u1ecd x\u00e1t c\u00f9ng m\u1ed9t ph\u1ea7n c\u1ee7a t\u1ea5m \u1ea5y, cho \u0111\u1ebfn khi n\u00f3 ph\u00e1t ra ti\u1ebfng k\u00eau. Sau \u0111\u00f3 gi\u1ea3m nh\u1eb9 s\u1ef1 c\u1ecd x\u00e1t \u0111\u1ec3 duy tr\u00ec ti\u1ebfng k\u00eau c\u1ee7a t\u1ea5m kim lo\u1ea1i. Khi \u1ea5y c\u00f3 th\u1ec3 quan s\u00e1t th\u1ea5y c\u00e1c h\u1ea1t c\u00e1t tr\u00ean t\u1ea5m kim lo\u1ea1i ph\u1eb3ng nh\u1ea3y nh\u00f3t nh\u00e0o l\u1ed9n, d\u1ea7n d\u1ea7n nh\u00f3m l\u1ea1i, h\u00ecnh th\u00e0nh n\u00ean hoa v\u0103n \u0111\u1eb9p \u0111\u1ebd, g\u1ecdi l\u00e0 \u0111\u1ed3 \u00e1n Kran. Ph\u1ea7n v\u00e0 s\u1ed1 \u0111i\u1ec3m c\u1ee7a ng\u00f3n tay t\u00ec v\u00e0o t\u1ea5m kim lo\u1ea1i ph\u1eb3ng kh\u00e1c nhau, \u0111\u1ed3 \u00e1n m\u00e0 c\u00e1t h\u00ecnh th\u00e0nh n\u00ean c\u0169ng kh\u00e1c nhau. V\u1ea3 l\u1ea1i m\u1ed7i lo\u1ea1i \u0111\u1ed3 \u00e1n \u0111\u1ec1u c\u00f3 m\u1ed1i li\u00ean h\u1ec7 v\u1edbi m\u1ed9t lo\u1ea1i \u00e2m \u0111i\u1ec7u ri\u00eang. D\u00f9ng t\u1ea5m kim lo\u1ea1i h\u00ecnh tr\u00f2n, h\u00ecnh tam gi\u00e1c, h\u00ecnh n\u0103m c\u1ea1nh l\u00e0m th\u1ef1c nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c c\u00e1c k\u1ebft qu\u1ea3 t\u01b0\u01a1ng t\u1ef1. Tr\u00ean th\u1ef1c t\u1ebf, \u0111\u1ed3 \u00e1n Kran l\u00e0 b\u1ea3n v\u1ebd h\u00ecnh t\u01b0\u1ee3ng c\u1ee7a s\u00f3ng d\u1eebng. Nh\u1eefng h\u1ea1t c\u00e1t tr\u00ean t\u1ea5m kim lo\u1ea1i ph\u1eb3ng bao gi\u1edd c\u0169ng t\u1ee5 t\u1eadp t\u1ea1i m\u1eaft (n\u00fat) s\u00f3ng kh\u00f4ng rung \u0111\u1ed9ng. Nh\u1eefng m\u1eaft s\u00f3ng n\u00e0y do nhi\u1ec1u \u0111i\u1ec3m n\u1ed1i th\u00e0nh \u0111\u01b0\u1eddng s\u00f3ng, c\u0169ng t\u1ee9c l\u00e0 \u0111\u01b0\u1eddng g\u1ee3n s\u00f3ng trong \u0111\u1ed3 \u00e1n.<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi t\u1ea5m kim lo\u1ea1i h\u00ecnh vu\u00f4ng ho\u1eb7c h\u00ecnh tr\u00f2n, h\u00ecnh d\u1ea1ng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a nh\u1eefng \u0111\u01b0\u1eddng g\u1ee3n s\u00f3ng n\u00e0y c\u00f3 th\u1ec3 d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p to\u00e1n h\u1ecdc \u0111\u1ec3 t\u00ednh m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. Nh\u01b0ng v\u1edbi c\u00e1c nh\u1ea1c c\u1ee5 nh\u01b0 v\u00e1n \u0111\u00e0n vi\u00f4l\u00f4ng, chi\u00eang, ch\u0169m cho\u1eb9, chu\u00f4ng v.v. kh\u00f4ng c\u00f2n l\u00e0 t\u1ea5m kim lo\u1ea1i ph\u1eb3ng hai chi\u1ec1u \u0111\u01a1n gi\u1ea3n n\u1eefa. \u0110\u1eb7c t\u00ednh \u00e2m nh\u1ea1c c\u1ee7a ch\u00fang ch\u1eb3ng nh\u1eefng \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi k\u00edch th\u01b0\u1edbc, h\u00ecnh d\u1ea1ng, m\u00e0 c\u00f2n li\u00ean quan t\u1edbi nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0: nguy\u00ean li\u1ec7u, c\u00f4ng ngh\u1ec7 gia c\u00f4ng v.v., ch\u1ec9 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c qua th\u1ef1c nghi\u1ec7m. R\u00f5 r\u00e0ng vi\u1ec7c l\u00e0m ra m\u1ed9t chi\u1ebfc vi\u00f4l\u00f4ng ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 k\u0129 x\u1ea3o cao si\u00eau.<\/p>\n\n\n\n
T\u1eeb x\u01b0a t\u1edbi nay, ng\u01b0\u1eddi ta d\u00f9ng tai \u0111\u1ec3 nghe \u00e2m thanh. C\u00f2n b\u00e2y gi\u1edd \u00e2m thanh l\u1ea1i c\u00f3 th\u1ec3 bi\u1ec3u hi\u1ec7n r\u00f5 nh\u1edd nh\u1eefng h\u1ea1t c\u00e1t. Th\u1eadt l\u00e0 k\u00ec di\u1ec7u h\u1ebft s\u1ee9c. Ch\u1ea3 tr\u00e1ch khi ph\u01a1i b\u00e0y \u0111\u1ed3 \u00e1n phong ph\u00fa nhi\u1ec1u v\u1ebb tr\u00ean t\u1ea5m kim lo\u1ea1i ph\u1eb3ng, Napoleon cao h\u1ee9ng ph\u00e1t bi\u1ec3u: “T\u00f4i \u0111\u00e3 “tr\u00f4ng th\u1ea5y” \u00e2m thanh c\u1ee7a n\u00f3 r\u1ed3i”.<\/p>\n\n\n\n
T\u1eeb kh\u00f3a: S\u00f3ng d\u1eebng; \u0110\u1ed3 \u00e1n.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Nh\u00e0 khoa h\u1ecdc Kran, ng\u01b0\u1eddi \u0110\u1ee9c, \u0111\u01b0\u1ee3c t\u00f4n vinh l\u00e0 ng\u01b0\u1eddi cha c\u1ee7a \u00e2m h\u1ecdc c\u1ed5 \u0111i\u1ec3n, c\u00f3 m\u1ed9t th\u1eddi r\u1ea5t say m\u00ea nghi\u00ean c\u1ee9u nguy\u00ean l\u00ed ph\u00e1t \u00e2m c\u1ee7a nh\u1ea1c c\u1ee5 d\u00e2y. \u0110\u1ec3 kh\u00e1m ph\u00e1 quy lu\u1eadt rung \u0111\u1ed9ng c\u1ee7a v\u00e1n \u0111\u00e0n vi\u00f4l\u00f4ng, \u00f4ng \u0111\u00e3 l\u00e0m m\u1ed9t lo\u1ea1t c\u00e1c th\u00ed nghi\u1ec7m l\u00ed th\u00fa, t\u1eeb […]<\/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-5606","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\/5606","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=5606"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5606\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}