Chu\u0301ng ta \u0111\u00ea\u0300u th\u00e2\u0301y r\u0103\u0300ng, tr\u00ean ph\u00e2\u0300n l\u01a1\u0301n ca\u0301c \u0111\u01b0\u01a1\u0300ng giao th\u00f4ng \u0111\u00ea\u0300u co\u0301 \u0111e\u0300n \u0111\u01b0\u01a1\u0300ng nh\u01b0ng tr\u00ean \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c la\u0323i kh\u00f4ng co\u0301. Ta\u0323i sao?<\/p>\n\n\n\n
Ca\u0301c loa\u0323i \u0111e\u0300n s\u01b0\u0309 du\u0323ng tr\u00ean \u0111\u01b0\u01a1\u0300ng giao th\u00f4ng \u0111\u00ea\u0300u co\u0301 \u0111\u00f4\u0323 chi\u00ea\u0301u sa\u0301ng r\u00e2\u0301t ke\u0301m; a\u0301nh sa\u0301ng chu\u0301ng pha\u0301t ra \u0111\u00ea\u0300u la\u0300 a\u0301nh sa\u0301ng ta\u0301n xa\u0323, vi\u0300 th\u00ea\u0301 chu\u0301ng d\u00ea\u0303 la\u0300m cho la\u0301i xe bi\u0323 hoa m\u0103\u0301t. Th\u00e2\u0323m chi\u0301 co\u0301 khi co\u0300n la\u0300m cho la\u0301i xe kh\u00f4ng ph\u00e2n bi\u00ea\u0323t \u0111\u01b0\u01a1\u0323c ca\u0301c bi\u00ea\u0309n hi\u00ea\u0323u giao th\u00f4ng, bi\u00ea\u0309n chi\u0309 \u0111\u01b0\u01a1\u0300ng va\u0300 ca\u0301c loa\u0323i ch\u01b0\u01a1\u0301ng nga\u0323i v\u00e2\u0323t. L\u01b0u l\u01b0\u01a1\u0323ng xe tr\u00ean ca\u0301c \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c r\u00e2\u0301t l\u01a1\u0301n, t\u00f4\u0301c \u0111\u00f4\u0323 la\u0323i nhanh vi\u0300 th\u00ea\u0301 y\u00eau c\u00e2\u0300u chi\u00ea\u0301u sa\u0301ng r\u00e2\u0301t cao. N\u00ea\u0301u l\u0103\u0301p \u0111\u0103\u0323t \u0111e\u0300n \u0111\u01b0\u01a1\u0300ng tr\u00ean ca\u0301c \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c, se\u0303 a\u0309nh h\u01b0\u01a1\u0309ng t\u01a1\u0301i vi\u00ea\u0323c quan sa\u0301t \u0111\u01b0\u01a1\u0300ng cu\u0309a la\u0301i xe, r\u00e2\u0301t d\u00ea\u0303 g\u00e2y ra tai na\u0323n. Vi\u0300 th\u00ea\u0301 ngoa\u0323i tr\u01b0\u0300 ca\u0301c \u0111oa\u0323n \u0111\u01b0\u01a1\u0300ng co\u0301 tra\u0323m x\u0103ng, tra\u0323m ba\u0309o d\u01b0\u01a1\u0303ng, s\u01b0\u0309a ch\u01b0\u0303a xe va\u0300 tra\u0323m ki\u00ea\u0309m soa\u0301t ra, tr\u00ean \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c th\u01b0\u01a1\u0300ng kh\u00f4ng co\u0301 \u0111e\u0300n \u0111\u01b0\u01a1\u0300ng. Nh\u01b0ng nh\u01b0 v\u00e2\u0323y, cu\u0303ng kh\u00f4ng co\u0301 nghi\u0303a la\u0300 \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c la\u0300 m\u00f4\u0323t ma\u0300u \u0111en. Ng\u01b0\u01a1\u0300i ta \u0111a\u0303 du\u0300ng m\u00f4\u0323t loa\u0323i v\u00e2\u0323t li\u00ea\u0323u ki\u00ea\u0309u m\u01a1\u0301i \u0111o\u0301 la\u0300 l\u01a1\u0301p ma\u0300ng pha\u0309n quang la\u0300m t\u01b0\u0300 ca\u0301c ha\u0323t vi thuy\u0309 tinh. Ho\u0323 \u0111em phu\u0309 l\u01a1\u0301p ma\u0300ng pha\u0309n quang na\u0300y l\u00ean ca\u0301c bi\u00ea\u0309n ti\u0301n hi\u00ea\u0323u giao th\u00f4ng b\u00ean \u0111\u01b0\u01a1\u0300ng, ca\u0301c da\u0309i ph\u00e2n lu\u00f4\u0300ng tr\u00ean m\u0103\u0323t \u0111\u01b0\u01a1\u0300ng va\u0300 ca\u0301c c\u00f4ng cu\u0323 ca\u0301c c\u00f4ng tri\u0300nh ki\u00ea\u0301n tru\u0301c phu\u0323c vu\u0323 giao th\u00f4ng. Lu\u0301c bi\u0300nh th\u01b0\u01a1\u0300ng chu\u0301ng kh\u00f4ng pha\u0301t sa\u0301ng; chi\u0309 khi na\u0300o g\u0103\u0323p a\u0301nh sa\u0301ng do \u0111e\u0300n tr\u01b0\u01a1\u0301c cu\u0309a xe \u00f4t\u00f4 chi\u00ea\u0301u t\u01a1\u0301i thi\u0300 chu\u0301ng m\u01a1\u0301i pha\u0309n xa\u0323 la\u0323i, nh\u01b0\u0303ng lu\u00f4\u0300ng a\u0301nh sa\u0301ng na\u0300y m\u00f4\u0323t ca\u0301ch co\u0301 \u0111i\u0323nh h\u01b0\u01a1\u0301ng va\u0300o m\u0103\u0301t cu\u0309a ng\u01b0\u01a1\u0300i la\u0301i xe. T\u00e2\u0300n su\u00e2\u0301t pha\u0309n xa\u0323 cu\u0309a loa\u0323i v\u00e2\u0323t li\u00ea\u0323u m\u01a1\u0301i na\u0300y r\u00e2\u0301t cao, l\u01a1\u0301n h\u01a1n 100 l\u00e2\u0300n so v\u01a1\u0301i ca\u0301c loa\u0323i s\u01a1n th\u00f4ng th\u01b0\u01a1\u0300ng; c\u01b0\u0323 ly pha\u0309n xa\u0323 l\u00ean t\u01a1\u0301i 1000 me\u0301t. \u0110i\u00ea\u0300u na\u0300y cu\u0303ng co\u0301 nghi\u0303a la\u0300 ca\u0301c la\u0301i xe \u01a1\u0309 ca\u0301ch xa 1000 me\u0301t \u0111a\u0303 co\u0301 th\u00ea\u0309 pha\u0301t hi\u00ea\u0323n th\u00e2\u0301y nh\u01b0\u0303ng \u0111i\u00ea\u0309m pha\u0309n quang tr\u00ean ca\u0301c bi\u00ea\u0309n ba\u0301o hi\u00ea\u0323u; \u01a1\u0309 ca\u0301ch xa 400m ng\u01b0\u01a1\u0300i ta \u0111a\u0303 co\u0301 th\u00ea\u0309 ph\u00e2n bi\u00ea\u0323t ro\u0303 ma\u0300u s\u0103\u0301c hi\u0300nh ve\u0303 va\u0300 ky\u0301 hi\u00ea\u0323u tr\u00ean nh\u01b0\u0303ng bi\u00ea\u0309n na\u0300y; ca\u0301ch xa 200 me\u0301t co\u0301 th\u00ea\u0309 nhi\u0300n ro\u0303 ch\u01b0\u0303 vi\u00ea\u0301t tr\u00ean bi\u00ea\u0309n hi\u00ea\u0323u. Nh\u01b0 v\u00e2\u0323y, chu\u0301ng co\u0301 ta\u0301c du\u0323ng to l\u01a1\u0301n trong vi\u00ea\u0323c gi\u01b0\u0303 an toa\u0300n cho xe c\u00f4\u0323 va\u0300o ban \u0111\u00eam khi \u0111i tr\u00ean \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c.<\/p>\n\n\n\n
Nh\u01b0\u0303ng ma\u0309ng vi thuy\u0309 tinh pha\u0309n quang \u0111\u01b0\u01a1\u0323c ch\u00ea\u0301 ta\u0323o t\u01b0\u0300 nh\u01b0\u0303ng ha\u0323t vi thuy\u0309 tinh quang ho\u0323c co\u0301 t\u00e2\u0300n s\u00f4\u0301 khu\u0301c xa\u0323 a\u0301nh sa\u0301ng r\u00e2\u0301t cao, sau \u0111o\u0301 \u0111\u01b0\u01a1\u0323c phu\u0309 l\u00ean m\u00f4\u0323t l\u01a1\u0301p ma\u0300ng quang ho\u0323c b\u0103\u0300ng kim loa\u0323i. \u0110\u01b0\u01a1\u0300ng ki\u0301nh cu\u0309a nh\u01b0\u0303ng ha\u0323t vi thuy\u0309 tinh na\u0300y r\u00e2\u0301t nho\u0309, chi\u0309 b\u0103\u0300ng m\u00f4\u0323t n\u01b0\u0309a \u0111\u01b0\u01a1\u0300ng ki\u0301nh s\u01a1\u0323i to\u0301c ng\u01b0\u01a1\u0300i. Th\u00f4ng th\u01b0\u01a1\u0300ng nh\u01b0\u0303ng v\u00e2\u0323t th\u00ea\u0309 tr\u00ean \u0111\u01b0\u01a1\u0300ng h\u00e2\u0301p thu\u0323 ph\u00e2\u0300n l\u01a1\u0301n a\u0301nh sa\u0301ng do \u0111e\u0300n \u0111\u01b0\u01a1\u0300ng pha\u0301t ra; chi\u0309 co\u0301 m\u00f4\u0323t ph\u00e2\u0300n nho\u0309 a\u0301nh sa\u0301ng \u0111\u01b0\u01a1\u0323c pha\u0309n xa\u0323 tr\u01a1\u0309 la\u0323i vi\u0300 th\u00ea\u0301 t\u00e2\u0300m nhi\u0300n cu\u0309a ng\u01b0\u01a1\u0300i la\u0301i xe tr\u00ean \u0111\u01b0\u01a1\u0300ng r\u00e2\u0301t ha\u0323n ch\u00ea\u0301. Nh\u01b0ng sau khi a\u0301nh sa\u0301ng chi\u00ea\u0301u va\u0300o l\u01a1\u0301p ma\u0300ng pha\u0309n quang tr\u00ean ca\u0301c bi\u00ea\u0309n hi\u00ea\u0323u, do ta\u0301c du\u0323ng khu\u0301c xa\u0323 a\u0301nh sa\u0301ng cu\u0309a nh\u01b0\u0303ng ha\u0323t vi thuy\u0309 tinh va\u0300 ta\u0301c du\u0323ng pha\u0309n xa\u0323 a\u0301nh sa\u0301ng cu\u0309a l\u01a1\u0301p ma\u0300ng kim loa\u0323i, a\u0301nh sa\u0301ng se\u0303 pha\u0309n xa\u0323 m\u00f4\u0323t ca\u0301ch co\u0301 \u0111i\u0323nh h\u01b0\u01a1\u0301ng quay tr\u01a1\u0309 v\u00ea\u0300 phi\u0301a ngu\u00f4\u0300n pha\u0301t ra a\u0301nh sa\u0301ng v\u01a1\u0301i c\u01b0\u01a1\u0300ng \u0111\u00f4\u0323 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng va\u0300 chi\u00ea\u0301u song song v\u01a1\u0301i a\u0301nh sa\u0301ng. Do \u0111o\u0301, b\u00ea\u0300 m\u0103\u0323t cu\u0309a v\u00e2\u0323t \u0111\u01b0\u01a1\u0323c chi\u00ea\u0301u sa\u0301ng \u0111\u01b0\u01a1\u0323c tr\u00f4ng th\u00e2\u0301y ro\u0303 ra\u0300ng nh\u00e2\u0301t. Vi\u0300 v\u00e2\u0323y, ma\u0300ng pha\u0309n quang ba\u0309n th\u00e2n no\u0301 kh\u00f4ng la\u0300m ti\u00eau hao n\u0103ng l\u01b0\u01a1\u0323ng ma\u0300 co\u0300n pha\u0301t ra a\u0301nh sa\u0301ng r\u01b0\u0323c r\u01a1\u0303 trong \u0111\u00eam t\u00f4\u0301i.<\/p>\n\n\n\n
Hi\u00ea\u0323n nay, ca\u0301c loa\u0323i v\u00e2\u0323t li\u00ea\u0323u pha\u0309n quang ki\u00ea\u0309u m\u01a1\u0301i na\u0300y kh\u00f4ng chi\u0309 \u0111\u01b0\u01a1\u0323c \u01b0\u0301ng du\u0323ng tr\u00ean \u0111\u01b0\u01a1\u0300ng giao th\u00f4ng ma\u0300 chu\u0301ng co\u0300n \u0111\u01b0\u01a1\u0323c \u01b0\u0301ng du\u0323ng ch\u00ea\u0301 ta\u0323o qu\u00e2\u0300n a\u0301o cu\u0309a nh\u01b0\u0303ng ng\u01b0\u01a1\u0300i la\u0300m c\u00f4ng ta\u0301c qua\u0309n ly\u0301 giao th\u00f4ng, c\u0103\u0323p sa\u0301ch cu\u0309a ho\u0323c sinh, l\u00f4\u0301p xe \u0111a\u0323p. Chu\u0301ng \u0111a\u0303 pha\u0301t huy vai tro\u0300 r\u00e2\u0301t l\u01a1\u0301n trong vi\u00ea\u0323c gi\u01b0\u0303 gi\u0300n an toa\u0300n giao th\u00f4ng.<\/p>\n","protected":false},"excerpt":{"rendered":"
Chu\u0301ng ta \u0111\u00ea\u0300u th\u00e2\u0301y r\u0103\u0300ng, tr\u00ean ph\u00e2\u0300n l\u01a1\u0301n ca\u0301c \u0111\u01b0\u01a1\u0300ng giao th\u00f4ng \u0111\u00ea\u0300u co\u0301 \u0111e\u0300n \u0111\u01b0\u01a1\u0300ng nh\u01b0ng tr\u00ean \u0111\u01b0\u01a1\u0300ng cao t\u00f4\u0301c la\u0323i kh\u00f4ng co\u0301. Ta\u0323i sao? Ca\u0301c loa\u0323i \u0111e\u0300n s\u01b0\u0309 du\u0323ng tr\u00ean \u0111\u01b0\u01a1\u0300ng giao th\u00f4ng \u0111\u00ea\u0300u co\u0301 \u0111\u00f4\u0323 chi\u00ea\u0301u sa\u0301ng r\u00e2\u0301t ke\u0301m; a\u0301nh sa\u0301ng chu\u0301ng pha\u0301t ra \u0111\u00ea\u0300u la\u0300 a\u0301nh sa\u0301ng ta\u0301n xa\u0323, vi\u0300 th\u00ea\u0301 […]<\/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":[1,15],"tags":[],"class_list":["post-11627","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11627","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=11627"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11627\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=11627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=11627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=11627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}