B\u00e0i 1 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang khi n\u00f3i v\u1ec1 s\u00f3ng \u0111i\u1ec7n t\u1eed?<\/span><\/p>\nA. Khi m\u1ed9t \u0111i\u1ec7n t\u00edch \u0111i\u1ec3m dao \u0111\u1ed9ng th\u00ec s\u1ebd c\u00f3 \u0111i\u1ec7n t\u1eeb tr\u01b0\u1eddng lan truy\u1ec1n trong kh\u00f4ng gian d\u01b0\u1edbi d\u1ea1ng s\u00f3ng.<\/p>\n
B. \u0110i\u1ec7n t\u00edch giao \u0111\u1ed9ng kh\u00f4ng th\u1ec3 b\u1ee9c x\u1ea1 ra s\u00f3ng \u0111i\u1ec7n t\u1eeb.<\/p>\n
C. T\u1ed1c \u0111\u1ed9 c\u1ee7a s\u00f3ng \u0111i\u1ec7n t\u1eeb trong ch\u00e2n kh\u00f4ng nh\u1ecf h\u01a1n nhi\u1ec1u l\u1ea7n so v\u1edbi v\u1eadn t\u1ed1c \u00e1nh s\u00e1ng trong ch\u00e2n kh\u00f4ng.<\/p>\n
D. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng \u0111i\u1ec7n t\u1eeb b\u1eb1ng n\u1eeda t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n t\u00edch dao \u0111\u1ed9ng.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn A.<\/p>\n
B\u00e0i 2 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Trong qu\u00e1 tr\u00ecnh l\u00e0n truy\u1ec1n s\u00f3ng \u0111i\u1ec7n t\u1eeb, vect\u01a1\u00a0B\u2192\u00a0v\u00e0 vect\u01a1\u00a0E\u2192\u00a0lu\u00f4n lu\u00f4n<\/span><\/p>\nA. Tr\u00f9ng Ph\u01b0\u01a1ng v\u1edbi nhau v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi Ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng.<\/p>\n
B. Dao \u0111\u1ed9ng c\u00f9ng pha.<\/p>\n
C. Dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha.<\/p>\n
D. Bi\u00ean thi\u00ean tu\u1ea7n ho\u00e0n theo th\u1eddi gian, kh\u00f4ng tu\u1ea7n ho\u00e0n theo th\u1eddi gian.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn B.<\/p>\n
B\u00e0i 3 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0T\u1ea1i \u0111i\u1ec3m A, B c\u00e1ch nhau 1 km \u0111\u1eb7t hai m\u00e1y bay ph\u00e1t s\u00f3ng \u0111i\u1ec7n t\u1eeb gi\u1ed1ng h\u1ec7t nhau. M\u1ed9t ng\u01b0\u1eddi c\u1ea7m m\u00e1y thu s\u00f3ng di chuy\u1ec3n truy\u1ec1n \u0111\u01b0\u1eddng th\u1eb3ng AB. H\u1ecfi t\u00edn hi\u1ec7u thu \u0111\u01b0\u1ee3c trong khi di chuy\u1ec3n \u1edf c\u00e1c v\u1ecb tr\u00ed c\u00f3 nh\u01b0 nhau kh\u00f4ng? T\u1ea1i sao?<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Hai s\u00f3ng \u0111i\u1ec7n t\u1eeb do hai ngu\u1ed3n ph\u00e1t ra gi\u1ed1ng h\u1ec7t nhau n\u00ean giao thoa v\u1edbi nhau. Tr\u00ean \u0111\u01b0\u1eddng th\u1eb3ng AB s\u1ebd c\u00f3 nh\u1eefng ch\u1ed7 c\u1ef1c \u0111\u1ea1i ta thu \u0111\u01b0\u1ee3c s\u00f3ng m\u1ea1nh, nh\u1eefng ch\u1ed7 c\u1ef1c ti\u1ec3u ta h\u1ea7u nh\u01b0 kh\u00f4ng thu \u0111\u01b0\u1ee3c s\u00f3ng.<\/p>\n
B\u00e0i 4 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0H\u00ecnh 4.3, c\u00e1c vect\u01a1 n\u1eb1m ngang bi\u1ec3u th\u1ecb v\u1eadn t\u1ed1c truy\u1ec1n s\u00f3ng \u0111i\u1ec7n t\u1eeb, c\u00e1c vect\u01a1 th\u1eb3ng \u0111\u1ee9ng bi\u1ec3u th\u1ecb c\u01b0\u1eddng \u0111\u1ed9 \u0111i\u1ec7n tr\u01b0\u1eddng. h\u00e3y v\u1ebd c\u00e1c vect\u01a1 c\u1ea3m \u1ee9ng t\u1eeb t\u01b0\u01a1ng \u1ee9ng theo \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
D\u00f9ng quy t\u1eafc \u0111\u1ecbnh \u1ed1c: ta quay c\u00e1i \u0111\u1ecbnh \u1ed1c cho ti\u1ec1n theo chi\u1ec1u d\u00f2ng \u0111i\u1ec7n th\u00ec vect\u01a1 E s\u1ebd quay \u0111\u1ebfn B. suy ra b\u00ean tr\u00e1i v\u00e0 b\u00ean ph\u1ea3i vect\u01a1 B \u0111\u1ec1u h\u01b0\u1edbng v\u00e0o trong trang gi\u1ea5y.<\/p>\n
\n
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C\u00c2U H\u1eceI C\u00e2u 1 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0T\u1ea1i sao l\u1ea1i n\u00f3i s\u00f3ng \u0111i\u1ec7n t\u1eeb l\u00e0 s\u00e1ng ngang? L\u1eddi gi\u1ea3i: S\u00f3ng \u0111i\u1ec7n t\u1eeb l\u00e0 s\u00f3ng ngang v\u00ec ph\u01b0\u01a1ng c\u1ee7a dao \u0111\u1ed9ng c\u00e1c vecto\u00a0E\u2192,\u00a0B\u2192\u00a0vu\u00f4ng g\u00f3c v\u1edbi ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng. C\u00e2u 2 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0S\u00f3ng \u0111i\u1ec7m t\u1eeb kh\u00e1c s\u00f3ng […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1434,1433],"yoast_head":"\n
Ch\u01b0\u01a1ng 4 - B\u00e0i 24: S\u00f3ng \u0111i\u1ec7n t\u1eeb<\/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-4-bai-24-song-dien-tu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 4 - B\u00e0i 24: S\u00f3ng \u0111i\u1ec7n t\u1eeb\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 132 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0T\u1ea1i sao l\u1ea1i n\u00f3i s\u00f3ng \u0111i\u1ec7n t\u1eeb l\u00e0 s\u00e1ng ngang? L\u1eddi gi\u1ea3i: S\u00f3ng \u0111i\u1ec7n t\u1eeb l\u00e0 s\u00f3ng ngang v\u00ec ph\u01b0\u01a1ng c\u1ee7a dao \u0111\u1ed9ng c\u00e1c vecto\u00a0E\u2192,\u00a0B\u2192\u00a0vu\u00f4ng g\u00f3c v\u1edbi ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng. 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