{"id":17026,"date":"2021-12-07T16:02:46","date_gmt":"2021-12-07T09:02:46","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=17026"},"modified":"2021-12-07T16:02:47","modified_gmt":"2021-12-07T09:02:47","slug":"set-hon-van-la-khoang-toi-trong-khoa-hoc","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/set-hon-van-la-khoang-toi-trong-khoa-hoc\/","title":{"rendered":"S\u00c9T H\u00d2N V\u1eaaN L\u00c0 KHO\u1ea2NG T\u1ed0I TRONG KHOA H\u1eccC"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: Nh\u1eefng b\u00ed \u1ea9n c\u1ee7a nh\u00e2n lo\u1ea1i &#8211; Minh Anh<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t qu\u1ea3 c\u1ea7u c\u1ee1 nh\u01b0 tr\u00e1i b\u00f3ng r\u1ed5, ch\u00f3i l\u00f2a, l\u01a1 l\u1eedng tr\u00ean m\u1eb7t \u0111\u1ea5t v\u00e0i gi\u00e2y r\u1ed3i bi\u1ebfn m\u1ea5t, th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc c\u00e1c c\u01a1n d\u00f4ng. \u0110\u00f3 l\u00e0 ch\u00e2n dung c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 b\u00ed hi\u1ec3m \u2013 s\u00e9t h\u00f2n. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 tin ch\u1eafc v\u1ec1 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a n\u00f3, nh\u01b0ng th\u1eeba nh\u1eadn r\u1eb1ng t\u1ea5t c\u1ea3 nh\u1eefng gi\u1ea3 thuy\u1ebft tr\u01b0\u1edbc \u0111\u00e2y v\u1ec1 s\u00e9t h\u00f2n m\u1edbi ch\u1ec9 l\u00e0 \u201cth\u1ea7y b\u00f3i xem voi\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u1ed9t b\u00e1o c\u00e1o m\u1edbi \u0111\u00e2y, Hi\u1ec7p h\u1ed9i ho\u00e0ng gia Anh \u0111\u00e3 \u0111\u01b0a ra l\u1eddi k\u1ec3 c\u1ee7a c\u00e1c nh\u00e2n ch\u1ee9ng, v\u1ed1n ch\u01b0a h\u1ec1 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1. M\u1ed9t trong s\u1ed1 h\u1ecd m\u00f4 t\u1ea3 qu\u1ea3 c\u1ea7u s\u00e1ng l\u00f2a \u0111\u00e3 \u0111\u1ec3 l\u1ea1i m\u1ed9t c\u00e1i h\u1ed1 to b\u1eb1ng qu\u1ea3 b\u00f3ng r\u1ed5 tr\u00ean b\u1ee9c t\u01b0\u1eddng khi n\u00f3 bay v\u00e0o m\u1ed9t ng\u00f4i nh\u00e0 \u1edf Oregon. Sau \u0111\u00f3 qu\u1ea3 c\u1ea7u l\u1eeda n\u00e0y chui xu\u1ed1ng t\u1ea7ng h\u1ea7m v\u00e0 g\u00e2y h\u1ecfng m\u1ed9t m\u00e1y c\u00e1n v\u1ea3i. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00e1c, m\u1ed9t qu\u1ea3 c\u1ea7u r\u1ef1c r\u1ee1 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 80 cm l\u1ea1i \u201ctr\u00eau ng\u01b0\u1eddi\u201d m\u1ed9t <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">gi\u00e1o vi\u00ean<\/a> ng\u01b0\u1eddi Nga, b\u1eb1ng c\u00e1ch \u0111\u1eadp v\u00e0o \u0111\u1ea7u \u00f4ng ta h\u01a1n 20 l\u1ea7n tr\u01b0\u1edbc khi bi\u1ebfn m\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc nay, l\u1eddi k\u1ec3 c\u1ee7a c\u00e1c nh\u00e2n ch\u1ee9ng nh\u01b0 th\u1ebf th\u01b0\u1eddng b\u1ecb coi l\u00e0 ma qu\u00e1i, l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a tr\u00ed t\u01b0\u1edfng t\u01b0\u1ee3ng. Nh\u01b0ng v\u1edbi kho\u1ea3ng 10.000 nh\u00e2n ch\u1ee9ng thu th\u1eadp trong v\u00e0i th\u1eadp k\u1ef7 qua, c\u00e1c nh\u00e0 khoa h\u1ecdc bu\u1ed9c ph\u1ea3i tin r\u1eb1ng s\u00e9t h\u00f2n th\u1ef1c s\u1ef1 t\u1ed3n t\u1ea1i. V\u00ec c\u00e1c b\u1ee9c \u1ea3nh ch\u1ee5p \u0111\u01b0\u1ee3c v\u1ec1 ch\u00fang r\u1ea5t hi\u1ebfm hoi. Theo ph\u00e1c th\u1ea3o c\u1ee7a Hi\u1ec7p h\u1ed9i ho\u00e0ng gia Anh, s\u00e9t h\u00f2n c\u00f3 nh\u1eefng nh\u1eadn d\u1ea1ng ch\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>M\u1ed9t qu\u1ea3 c\u1ea7u l\u1eeda s\u00e1ng ch\u00f3i, t\u1ed3n t\u1ea1i kho\u1ea3ng 10 gi\u00e2y.<\/li><li>Qu\u1ea3 c\u1ea7u n\u00e0y ch\u1ea1y quanh, \u0111\u00f4i khi lao xu\u1ed1ng ho\u1eb7c bay v\u1ee5t l\u00ean, \u0111\u00f4i khi l\u1ea9n v\u00e0o trong nh\u00e0 ho\u1eb7c xuy\u00ean qua c\u1eeda k\u00ednh.<\/li><li>Ch\u00fang th\u01b0\u1eddng bi\u1ebfn m\u1ea5t sau m\u1ed9t ti\u1ebfng n\u1ed5, \u0111\u00f4i khi k\u00e9o theo s\u1ef1 ph\u00e1 h\u1ee7y.<\/li><li>C\u00e1c \u201cth\u1ea7y b\u00f3i xem voi\u201d<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00fd gi\u1ea3i v\u1ec1 qu\u1ea3 b\u00f3ng s\u00e9t n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u00ec ph\u1ee9c t\u1ea1p. Ng\u01b0\u1eddi ta kh\u00f4ng hi\u1ec3u t\u1ea1i sao s\u00e9t h\u00f2n c\u00f3 th\u1ec3 s\u00e1ng nh\u01b0 m\u1ed9t b\u00f3ng \u0111\u00e8n 100 W, nh\u01b0ng l\u1ea1i kh\u00f4ng c\u00f3 n\u0103ng l\u01b0\u1ee3ng h\u1eefu h\u00ecnh. N\u00f3 kh\u00f4ng b\u1ee9c x\u1ea1 nhi\u1ec7t, d\u00f9 c\u00f3 th\u1ec3 l\u00e0m tan ch\u1ea3y k\u00ednh khi l\u01a1 l\u1eedng tr\u00ean c\u00e1c c\u00e1nh c\u1eeda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00f3ng ma xu\u1ea5t hi\u1ec7n \u0111\u1ed9t ng\u1ed9t v\u00e0 nu\u1ed1t nh\u1eefng con t\u00e0u<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo m\u1ed9t gi\u1ea3 thuy\u1ebft c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn, s\u00e9t h\u00f2n h\u00ecnh th\u00e0nh khi m\u1ed9t tia ch\u1edbp \u0111\u00e1nh xu\u1ed1ng l\u00e0m b\u1ed1c h\u01a1i silic dioxin trong \u0111\u1ea5t. H\u01a1i silic n\u00e0y ng\u01b0ng t\u1ee5 d\u01b0\u1edbi d\u1ea1ng b\u1ee5i m\u1ecbn, g\u1eafn k\u1ebft v\u1edbi nhau nh\u1edd c\u00e1c \u0111i\u1ec7n t\u00edch, t\u1ea1o n\u00ean m\u1ed9t qu\u1ea3 c\u1ea7u tr\u00f4i n\u1ed5i, b\u1ecb \u00f4xi h\u00f3a v\u00e0 b\u00f9ng s\u00e1ng. M\u1ed9t kh\u1ea3 n\u0103ng kh\u00e1c l\u00e0 kh\u00f4ng kh\u00ed b\u1ecb c\u00e1c tia ch\u1edbp ion h\u00f3a \u0111\u00e3 h\u00f3a h\u1ee3p v\u1edbi n\u01b0\u1edbc, t\u1ea1o th\u00e0nh m\u1ed9t qu\u1ea3 c\u1ea7u plasma n\u00f3ng v\u1edbi l\u1edbp v\u1ecf l\u00e0 ion v\u00e0 n\u01b0\u1edbc l\u1ea1nh. Tuy nhi\u00ean, b\u00e1o c\u00e1o c\u1ee7a Hi\u1ec7p h\u1ed9i ho\u00e0ng gia Anh l\u1ea1i cho r\u1eb1ng kh\u00f4ng c\u00f3 gi\u1ea3 thuy\u1ebft n\u00e0o trong s\u1ed1 c\u00e1c gi\u1ea3 thuy\u1ebft hi\u1ec7n nay gi\u1ea3i th\u00edch tr\u1ecdn v\u1eb9n b\u00ed \u1ea9n v\u1ec1 s\u00e9t h\u00f2n, m\u00e0 n\u00f3 c\u00f3 th\u1ec3 l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a m\u1ed9t chu\u1ed7i c\u00e1c qu\u00e1 tr\u00ecnh kh\u00e1c nhau. M\u00f4 ph\u1ecfng nh\u1eefng qu\u00e1 tr\u00ecnh n\u00e0y trong ph\u00f2ng th\u00ed nghi\u1ec7m c\u00f3 th\u1ec3 t\u1ea1o \u0111\u01b0\u1ee3c m\u1ed9t qu\u1ea3 c\u1ea7u s\u00e9t, nh\u01b0ng nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c d\u1ea1ng th\u1ee9c k\u1ef3 l\u1ea1 trong t\u1ef1 nhi\u00ean v\u00e0 kh\u00f4ng t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c l\u00e2u nh\u01b0 th\u1ebf. Theo c\u00e1c nh\u00e0 khoa h\u1ecdc, n\u1ebfu c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 s\u00e9t h\u00f2n v\u00e0 t\u1ea1o ra n\u00f3 trong ph\u00f2ng th\u00ed nghi\u1ec7m, ng\u01b0\u1eddi ta s\u1ebd t\u00ecm ra m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi duy tr\u00ec c\u00e1c ph\u1ea3n \u1ee9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao, r\u1ea5t c\u00f3 \u00edch trong c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: Nh\u1eefng b\u00ed \u1ea9n c\u1ee7a nh\u00e2n lo\u1ea1i &#8211; Minh Anh M\u1ed9t qu\u1ea3 c\u1ea7u c\u1ee1 nh\u01b0 tr\u00e1i b\u00f3ng r\u1ed5, ch\u00f3i l\u00f2a, l\u01a1 l\u1eedng tr\u00ean m\u1eb7t \u0111\u1ea5t v\u00e0i gi\u00e2y r\u1ed3i bi\u1ebfn m\u1ea5t, th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc c\u00e1c c\u01a1n d\u00f4ng. \u0110\u00f3 l\u00e0 ch\u00e2n dung c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 b\u00ed hi\u1ec3m \u2013 s\u00e9t h\u00f2n. C\u00e1c nh\u00e0 [&hellip;]<\/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":[24],"tags":[],"class_list":["post-17026","post","type-post","status-publish","format-standard","hentry","category-kham-pha"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17026","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=17026"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17026\/revisions"}],"predecessor-version":[{"id":17027,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17026\/revisions\/17027"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=17026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=17026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=17026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}