B\u00e0i 1 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Tr\u00ecnh b\u00e0y th\u00ed nghi\u1ec7m c\u1ee7a Niuton v\u1ec1 s\u1ef1 t\u00e1n s\u1eafc \u00e1nh s\u00e1ng.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Th\u00ed nghi\u1ec7m c\u1ee7a Niuton v\u1ec1 s\u1ef1 t\u00e1n s\u1eafc \u00e1nh s\u00e1ng:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-585.png\")
<\/p>\n
H\u00ecnh 24.1<\/i><\/p>\n
Chi\u1ebfu m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng (\u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi), song song qua khe h\u1eb9p F. \u0110\u1eb7t m\u1ed9t m\u00e0n M song song v\u1edbi khe F. Gi\u1eefa khe F v\u00e0 m\u00e0n M, \u0111\u1eb7t m\u1ed9t l\u0103ng k\u00ednh (P), sao cho c\u1ea1nh kh\u00fac x\u1ea1 c\u1ee7a (P) song song v\u1edbi F. Ch\u00f9m tia s\u00e1ng l\u00f3 ra kh\u1ecfi l\u0103ng k\u00ednh kh\u00f4ng nh\u1eefng b\u1ecb l\u1ec7ch v\u1ec1 ph\u00eda \u0111\u00e1y l\u0103ng k\u00ednh, m\u00e0 c\u00f2n b\u1ecb t\u00e1ch ra th\u00e0nh nhi\u1ec1u ch\u00f9m s\u00e1ng c\u00f3 m\u00e0u s\u1eafc kh\u00e1c nhau. Tr\u00ean m\u00e0n M, ta thu \u0111\u01b0\u1ee3c m\u1ed9t d\u1ea3i m\u00e0u g\u1ed3m 7 m\u00e0u ch\u00ednh: \u0111\u1ecf, cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm. D\u1ea3i s\u00e1ng m\u00e0u n\u00e0y g\u1ecdi l\u00e0 quang ph\u1ed5 c\u1ee7a M\u1eb7t Tr\u1eddi.<\/p>\n
B\u00e0i 2 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Tr\u00ecnh b\u00e0y th\u00ed nghi\u1ec7m v\u1edbi \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc c\u1ee7a Niuton.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Th\u00ed nghi\u1ec7m v\u1edbi \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc c\u1ee7a Niu \u2013 t\u01a1n:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-586.png\")
<\/p>\n
Tr\u00ean m\u00e0n M c\u1ee7a th\u00ed nghi\u1ec7m t\u00e1n s\u1eafc \u00e1nh s\u00e1ng, Niuton r\u1ea1ch m\u1ed9t khe h\u1eb9p F’ song song v\u1edbi khe F, \u0111\u1ec3 t\u00e1ch ra m\u1ed9t ch\u00f9m s\u00e1ng h\u1eb9p, ch\u1ec9 c\u00f3 m\u00e0u v\u00e0ng. Cho ch\u00f9m s\u00e1ng m\u00e0u v\u00e0ng qua l\u0103ng k\u00ednh (P’) v\u00e0 h\u01b0\u1edbng ch\u00f9m tia l\u00f3 tr\u00ean m\u00e0n M’, v\u1ec7t s\u00e1ng tr\u00ean m\u00e0n M’, v\u1eabn b\u1ecb l\u1ec7ch v\u1ec1 ph\u00eda \u0111\u00e1y c\u1ee7a l\u0103ng k\u00ednh (P’) nh\u01b0ng v\u1eabn gi\u1eef nguy\u00ean m\u00e0u v\u00e0ng. Niuton g\u1ecdi ch\u00f9m s\u00e1ng n\u00e0y l\u00e0 ch\u00f9m s\u00e1ng \u0111\u01a1n s\u1eafc. V\u1eady \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc l\u00e0 \u00e1nh s\u00e1ng c\u00f3 m\u1ed9t m\u00e0u nh\u1ea5t \u0111\u1ecbnh v\u00e0 kh\u00f4ng b\u1ecb t\u00e1n s\u1eafc khi qua l\u0103ng k\u00ednh.<\/p>\n
\n
\n
B\u00e0i 3 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Trong th\u00ed nghi\u1ec7m v\u1edbi \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc c\u1ee7a Niuton, n\u1ebfu ta b\u1ecf m\u00e0n M \u0111i r\u1ed3i \u0111\u01b0a hai l\u0103ng k\u00ednh l\u1ea1i s\u00e1t nhau, nh\u01b0ng v\u1eabn \u0111\u1eb7t ng\u01b0\u1ee3c chi\u1ec1u nhau, th\u00ec \u00e1nh s\u00e1ng c\u00f3 c\u00f2n b\u1ecb t\u00e1n s\u1eafc hay kh\u00f4ng?<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Trong th\u00ed nghi\u1ec7m v\u1edbi \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc c\u1ee7a Niuton, n\u1ebfu ta b\u1ecf m\u00e0n M \u0111i r\u1ed3i \u0111\u01b0a hai l\u0103ng k\u00ednh l\u1ea1i s\u00e1t nhau, nh\u01b0ng v\u1eabn \u0111\u1eb7t ng\u01b0\u1ee3c chi\u1ec1u nhau th\u00ec \u00e1nh s\u00e1ng khoog c\u00f2n b\u1ecb t\u00e1n s\u1eafc, v\u00ec l\u0103ng k\u00ednh P \u0111\u00e3 ph\u00e2n t\u00edch ch\u00f9m s\u00e1ng th\u00e0nh quang ph\u1ed5, c\u00f2n l\u0103ng k\u00ednh P’ l\u1ea1i t\u1ed5ng h\u1ee3p c\u00e1c ch\u00f9m s\u00e1ng \u1ea5y l\u1ea1i. Tr\u00ean m\u00e0n M’ ta thu \u0111\u01b0\u1ee3c v\u1ec7t s\u00e1ng c\u00f3 m\u00e0u tr\u1eafng, nh\u01b0ng vi\u1ec1n \u0111\u1ecf \u1edf c\u1ea1ch tr\u00ean v\u00e0 vi\u1ec1n t\u00edm \u1edf c\u1ea1nh d\u01b0\u1edbi.<\/p>\n
B\u00e0i 4 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\nTh\u00ed nghi\u1ec7m v\u1edbi \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc c\u1ee7a Niuton nh\u1eb1m ch\u1ee9ng minh<\/p>\n
A. s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc<\/p>\n
B. l\u0103ng k\u00ednh kh\u00f4ng l\u00e0m thay \u0111\u1ed5i m\u00e0u s\u1eafc c\u1ee7a \u00e1nh s\u00e1ng qua n\u00f3.<\/p>\n
C. \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi kh\u00f4ng ph\u1ea3i l\u00e0 \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc.<\/p>\n
D. \u00e1nh s\u00e1ng c\u00f3 b\u1ea5t k\u00ec m\u00e0u g\u00ec, khi qua l\u0103ng k\u00ednh c\u0169ng b\u1ecb l\u1ec7ch v\u1ec1 ph\u00eda \u0111\u1ea5y.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n
B\u00e0i 5 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ed9t l\u0103ng k\u00ednh th\u1ee7y tinh c\u00f3 g\u00f3c chi\u1ebft quang A = 5o<\/sup>, \u0111\u01b0\u1ee3c coi l\u00e0 nh\u1ecf, c\u00f3 chi\u1ebft su\u1ea5t \u0111\u1ed1i v\u1edbi \u00e1nh s\u00e1ng \u0111\u1ecf v\u00e0 \u00e1nh s\u00e1ng t\u00edm l\u1ea7n l\u01b0\u1ee3t l\u00e0 n\u0111<\/sub>\u00a0= 1,643 v\u00e0 nt<\/sub>\u00a0= 1,685. Cho m\u1ed9t ch\u00f9m s\u00e1ng tr\u1eafng h\u1eb9p r\u1ecdi v\u00e0o m\u1ed9t m\u1eb7t b\u00ean c\u1ee7a l\u0103ng k\u00ednh, d\u01b0\u1edbi g\u00f3c t\u1edbi i nh\u1ecf. T\u00ednh g\u00f3c gi\u1eefa tia t\u00edm v\u00e0 tia \u0111\u1ecf sau khi l\u00f3 ra kh\u1ecfi l\u0103ng k\u00ednh.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
C\u00e1c c\u00f4ng th\u1ee9c l\u0103ng k\u00ednh:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-587.png\")
<\/p>\n
Khi g\u00f3c t\u1edbi i v\u00e0 g\u00f3c chi\u1ebft quang A l\u00e0 g\u00f3c nh\u1ecf th\u00ec ta c\u00f3:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/2-390.png\")
<\/p>\n
G\u00f3c l\u1ec7ch c\u1ee7a tia \u0111\u1ecf sau khi qua l\u0103ng k\u00ednh:<\/p>\n
D1<\/sub>\u00a0= (n\u0111<\/sub>\u00a0\u2013 1)A = (1,643 \u2013 1)5 = 3,215o<\/sup><\/p>\n\u0110\u1ed9 l\u1ec7ch c\u1ee7a tia t\u00edm sau khi qua l\u0103ng k\u00ednh:<\/p>\n
D2<\/sub>\u00a0= (nt<\/sub>\u00a0\u2013 1)A = (1,685 \u2013 1)5 = 3.425o<\/sup><\/p>\nG\u00f3c gi\u1eefa tia t\u00edm v\u00e0 tia tia \u0111\u1ecf sau khi l\u00f3 ra kh\u1ecfi l\u0103ng k\u00ednh:<\/p>\n
\u0394D = D2<\/sub>\u00a0– D1<\/sub>\u00a0= 3.425o<\/sup>\u00a0– 3,215o<\/sup>\u00a0= 0,21o<\/sup>\u00a0= 12,6′<\/p>\nB\u00e0i 6 (trang 125 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ed9t c\u00e1i b\u1ec3 s\u00e2u 1,2m ch\u1ee9a \u0111\u1ea7y n\u01b0\u1edbc. M\u1ed9t tia s\u00e1ng M\u1eb7t Tr\u1eddi r\u1ecdi v\u00e0o m\u1eb7t n\u01b0\u1edbc b\u1ec3, d\u01b0\u1edbi g\u00f3c t\u1edbi i, c\u00f3 tani = 4\/3. T\u00ednh \u0111\u1ed9 d\u00e0i c\u1ee7a v\u1ebft s\u00e1ng t\u1ea1o \u1edf \u0111\u00e1y b\u1ec3. Cho bi\u1ebft: chi\u1ebft su\u1ea5t c\u1ee7a n\u01b0\u1edbc \u0111\u1ed1i v\u1edbi \u00e1nh s\u00e1ng \u0111\u1ecf v\u00e0 \u00e1nh s\u00e1ng t\u00edm l\u1ea7n l\u01b0\u1ee3t l\u00e0 n\u0111<\/sub>\u00a0= 1,328 v\u00e0 nt<\/sub>\u00a0= 1,343.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
– H\u00ecnh minh h\u1ecda:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-588.png\")
<\/p>\n
Tia s\u00e1ng M\u1eb7t Tr\u1eddi v\u00e0o n\u01b0\u1edbc b\u1ecb t\u00e1n s\u1eafc v\u00e0 kh\u00fac x\u1ea1. Tia \u0111\u1ecf l\u1ec7ch \u00edt nh\u1ea5t, tia t\u00edm l\u1ec7ch nhi\u1ec1u nh\u1ea5t.<\/p>\n
Ta c\u00f3:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/2-391.png\")
<\/p>\n
\u0110\u1ed9 d\u00e0i quang ph\u1ed5 d\u01b0\u1edbi \u0111\u00e1y b\u1ec3 l\u00e0:<\/p>\n
a = h(tanr2<\/sub>\u00a0– tanr1<\/sub>) =\u00a02,06 cm<\/b><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"B\u00e0i 1 (trang 125 SGK V\u1eadt L\u00fd 12):\u00a0Tr\u00ecnh b\u00e0y th\u00ed nghi\u1ec7m c\u1ee7a Niuton v\u1ec1 s\u1ef1 t\u00e1n s\u1eafc \u00e1nh s\u00e1ng. L\u1eddi gi\u1ea3i: Th\u00ed nghi\u1ec7m c\u1ee7a Niuton v\u1ec1 s\u1ef1 t\u00e1n s\u1eafc \u00e1nh s\u00e1ng: H\u00ecnh 24.1 Chi\u1ebfu m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng (\u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi), song song qua khe h\u1eb9p F. \u0110\u1eb7t m\u1ed9t m\u00e0n M song song […]<\/p>\n","protected":false},"author":3,"featured_media":24752,"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
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