B\u00e0i 5 (trang 45 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang<\/span><\/p>\nHi\u1ec7n t\u01b0\u1ee3ng giao thoa l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng<\/p>\n
A. giao thoa c\u1ee7a hai s\u00f3ng t\u1ea1i m\u1ed9t \u0111i\u1ec3m c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n
B. t\u1ed5ng h\u1ee3p c\u1ee7a hai dao \u0111\u1ed9ng<\/p>\n
C. t\u1ea1o th\u00e0nh c\u00e1c g\u1ee3n l\u1ed3i, l\u00f5m<\/p>\n
D. hai s\u00f3ng, khi g\u1eb7p nhau c\u00f3 nh\u1eefng \u0111i\u1ec3m ch\u00fang lu\u00f4n lu\u00f4n t\u0103ng c\u01b0\u1eddng nhau, c\u00f3 nh\u1eefng \u0111i\u1ec3m ch\u00fang lu\u00f4n lu\u00f4n tri\u1ec7t ti\u00eau nhau.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n D.<\/p>\n
B\u00e0i 6 (trang 45 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\nHai ngu\u1ed3n k\u1ebft h\u1ee3p l\u00e0 hai ngu\u1ed3n c\u00f3<\/p>\n
A. c\u00f9ng bi\u00ean \u0111\u1ed9<\/p>\n
B. c\u00f9ng t\u1ea7n s\u1ed1<\/p>\n
C. c\u00f9ng pha ban \u0111\u1ea7u<\/p>\n
D. c\u00f9ng t\u1ea7n s\u1ed1 v\u00e0 hi\u1ec7u s\u1ed1 pha kh\u00f4ng \u0111\u1ed5i theo th\u1eddi gian<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n D.<\/p>\n
B\u00e0i 7 (trang 45 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh 8.1, v\u1eadn t\u1ed1c truy\u1ec1n s\u00f3ng l\u00e0 0,5 m\/s, c\u1ea7n rung c\u00f3 t\u1ea7n s\u1ed1 40Hz. T\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh hai hypebol c\u00f9ng lo\u1ea1i li\u00ean ti\u1ebfp tr\u00ean h\u00ecnh 8.2.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Kho\u1ea3ng c\u00e1ch gi\u1eefa hai hyperbol c\u00f9ng lo\u1ea1i b\u1eb1ng n\u1eeda b\u01b0\u1edbc s\u00f3ng.<\/p>\n
Ta c\u00f3:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-625.png\")
<\/div>\n
\n
B\u00e0i 8 (trang 45 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh 8.1, kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m S1<\/sub>, S2<\/sub>\u00a0l\u00e0 d = 11 cm. Cho c\u1ea7n rung, ta th\u1ea5y hai \u0111i\u1ec3m S1<\/sub>, S2<\/sub>\u00a0g\u1ea7n nh\u01b0 \u0111\u1ee9ng y\u00ean v\u00e0 gi\u1eefa ch\u00fang c\u00f2n 10 \u0111i\u1ec3m \u0111\u1ee9ng y\u00ean kh\u00f4ng dao \u0111\u1ed9ng. Bi\u1ebft t\u1ea7n s\u1ed1 c\u1ee7a c\u1ea7n rung l\u00e0 26 Hz, h\u00e3y t\u00ednh t\u1ed1c \u0111\u1ed9 truy\u1ec1n c\u1ee7a s\u00f3ng.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Kho\u1ea3ng c\u00e1ch gi\u1eefa hai n\u00fat li\u00ean ti\u1ebfp b\u1eb1ng \u03bb\/2<\/p>\n
S1<\/sub>, S2<\/sub>\u00a0l\u00e0 hai n\u00fat, kho\u1ea3ng gi\u1eefa S1<\/sub>S2<\/sub>\u00a0c\u00f3 10 n\u00fat<\/p>\n=> ta c\u00f3 12 n\u00fat<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-626.png\")
<\/p>\n
V\u1eady t\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng l\u00e0:<\/p>\n
v = \u03bbf = 2.26 =\u00a052 cm\/s<\/b><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 45 SGK V\u1eadt L\u00fd 12):\u00a0Hi\u1ec7n t\u01b0\u1ee3ng giao thoa c\u1ee7a hai s\u00f3ng l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: Hi\u1ec7n t\u01b0\u1ee3ng giao thoa l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng hai s\u00f3ng k\u1ebft h\u1ee3p khi g\u1eb7p nhau th\u00ec c\u00f3 nh\u1eefng \u0111i\u1ec3m \u1edf \u0111\u00f3 ch\u00fang lu\u00f4n lu\u00f4n t\u0103ng c\u01b0\u1eddng l\u1eabn nhau; c\u00f3 nh\u1eefng \u0111i\u1ec3m \u1edf \u0111\u00f3 ch\u00fang lu\u00f4n lu\u00f4n tri\u1ebft ti\u00eau […]<\/p>\n","protected":false},"author":3,"featured_media":24851,"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 2 - B\u00e0i 8: Giao thoa s\u00f3ng<\/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-2-bai-8-giao-thoa-song\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i 8: Giao thoa s\u00f3ng\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 45 SGK V\u1eadt L\u00fd 12):\u00a0Hi\u1ec7n t\u01b0\u1ee3ng giao thoa c\u1ee7a hai s\u00f3ng l\u00e0 g\u00ec? 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![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-624.png\")
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