B\u00e0i 4 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Tr\u00ecnh b\u00e0y c\u1ea5u t\u1ea1o c\u1ee7a laze rubi.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
– H\u00ecnh minh h\u1ecda (tham kh\u1ea3o trang 171 sgk L\u00fd 12):<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-569.png\")
<\/p>\n
– C\u1ea5u t\u1ea1o:<\/p>\n
+ M\u1ed9t thanh rubi h\u00ecnh tr\u1ee5. Hai m\u1eb7t \u0111\u01b0\u1ee3c m\u00e0i nh\u1eb5n, vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c c\u1ee7a thanh.<\/p>\n
+ B\u1ec1 m\u1eb7t ph\u1ea3n x\u1ea1 (1) \u0111\u01b0\u1ee3c m\u1ea1 b\u1ea1c th\u00e0nh m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng c\u00f3 m\u1eb7t ph\u1ea3n x\u1ea1 quay v\u00e0o ph\u00eda trong.<\/p>\n
+ B\u1ec1 m\u1eb7t b\u00e1n m\u1ea1 (2) c\u00f3 t\u00e1c d\u1ee5ng \u0111\u1ec3 cho kho\u1ea3ng 50% c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a ch\u00f9m s\u00e1ng chi\u1ebfu t\u1edbi b\u1ecb ph\u1ea3n x\u1ea1, c\u00f2n kho\u1ea3ng 50% truy\u1ec1n qua.<\/p>\n
B\u00e0i 5 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0C\u00f3 nh\u1eefng lo\u1ea1i laze g\u00ec?<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
C\u00e1c lo\u1ea1i laze:<\/p>\n
– Laze kh\u00ed.<\/p>\n
– Laze r\u1eafn<\/p>\n
– Laze b\u00e1n d\u1eabn.<\/p>\n
B\u00e0i 6 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Tr\u00ecnh b\u00e0y m\u1ed9t v\u00e0i \u1ee9ng d\u1ee5ng c\u1ee7a laze.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
– \u1ee8ng d\u1ee5ng c\u1ee7a laze:<\/p>\n
– Trong y h\u1ecdc: ch\u1eefa m\u1ed9t s\u1ed1 b\u1ec7nh ngo\u00e0i da.<\/p>\n
– Trong c\u00f4ng nghi\u1ec7p: \u0111\u1ec3 c\u1eaft, khoan kim lo\u1ea1i.<\/p>\n
– Trong tr\u1eafc \u0111\u1ecba: \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch, ng\u1eafm \u0111\u01b0\u1eddng th\u1eb3ng.<\/p>\n
– D\u00f9ng trong c\u00e1c \u0111\u1ea7u l\u1ecdc \u0111\u0129a CD, b\u00fat ch\u1ec9 b\u1ea3ng.<\/p>\n
\n
\n
B\u00e0i 7 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\nCh\u00f9m s\u00e1ng do laze rubi ph\u00e1t ra c\u00f3 m\u00e0u:<\/p>\n
A. Tr\u1eafng<\/p>\n
B. Xanh<\/p>\n
C. \u0110\u1ecf<\/p>\n
D. V\u00e0ng.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n
B\u00e0i 8 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Tia laze kh\u00f4ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?<\/span><\/p>\nA. \u0110\u1ed9 \u0111\u01a1n s\u1eafc cao.<\/p>\n
B. \u0110\u1ed9 \u0111\u1ecbnh h\u01b0\u1edbng cao<\/p>\n
C. C\u01b0\u1eddng \u0111\u1ed9 l\u1edbn.<\/p>\n
D. C\u00f4ng su\u1ea5t l\u1edbn<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n D.<\/p>\n
V\u00ec tia laze c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 t\u00ednh \u0111\u01a1n s\u1eafc cao, \u0111\u1ecbnh h\u01b0\u1edbng cao, c\u01b0\u1eddng \u0111\u1ed9 l\u1edbn.<\/p>\n
B\u00e0i 9 (trang 173 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0B\u00fat laze m\u00e0 ta th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 ch\u1ec9 b\u1ea3ng thu\u1ed9c lo\u1ea1i laze n\u00e0o?<\/span><\/p>\nA. Kh\u00ed<\/p>\n
B. L\u1ecfng<\/p>\n
C. R\u1eafn<\/p>\n
D. B\u00e1n d\u1eabn<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n D.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 173 SGK V\u1eadt L\u00fd 12):\u00a0Laze l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: Laze\u00a0l\u00e0 m\u1ed9t ngu\u1ed3n s\u00e1ng ph\u00e1t ra m\u1ed9t ch\u00f9m s\u00e1ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 l\u1edbn d\u1ef1a tr\u00ean vi\u1ec7c \u1ee9ng d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng ph\u00e1t x\u1ea1 c\u1ea3m \u1ee9ng. B\u00e0i 2 (trang 173 SGK V\u1eadt L\u00fd 12):\u00a0N\u00eau c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a chum s\u00e1ng (tia laze) do laze ph\u00e1t […]<\/p>\n","protected":false},"author":3,"featured_media":24667,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1303],"tags":[1428,1427],"yoast_head":"\n
Ch\u01b0\u01a1ng 6 - B\u00e0i 34: S\u01a1 l\u01b0\u1ee3c v\u1ec1 laze<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-6-bai-34-so-luoc-ve-laze\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 6 - B\u00e0i 34: S\u01a1 l\u01b0\u1ee3c v\u1ec1 laze\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 173 SGK V\u1eadt L\u00fd 12):\u00a0Laze l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: Laze\u00a0l\u00e0 m\u1ed9t ngu\u1ed3n s\u00e1ng ph\u00e1t ra m\u1ed9t ch\u00f9m s\u00e1ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 l\u1edbn d\u1ef1a tr\u00ean vi\u1ec7c \u1ee9ng d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng ph\u00e1t x\u1ea1 c\u1ea3m \u1ee9ng. 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