{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng ta thu \u0111\u01b0\u1ee3c m\u1ed9t tia ph\u1ea3n x\u1ea1 t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c $40{}^\\circ $. T\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a g\u00f3c t\u1edbi:","select":["A. $20{}^\\circ $","B. $80{}^\\circ $","C. $60{}^\\circ $","D. $40{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3 tia ph\u1ea3n x\u1ea1 t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c $40{}^\\circ $, m\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 v\u00e0 g\u00f3c t\u1edbi b\u1eb1ng nhau n\u00ean gi\u00e1 tr\u1ecb c\u1ee7a g\u00f3c t\u1edbi l\u00e0: 40:2 = $20{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2111},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h0.jpg'\/><\/center>Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng, ta thu \u0111\u01b0\u1ee3c m\u1ed9t tia ph\u1ea3n x\u1ea1 IR t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c $60{}^\\circ $ ( h\u00ecnh 4.4). T\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a g\u00f3c t\u1edbi I v\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 r.","select":["A. i = r = $60{}^\\circ $","B. i = r = $30{}^\\circ $","C. i = $20{}^\\circ $, r = $40{}^\\circ $","D. i = r = $120{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3 tia ph\u1ea3n x\u1ea1 IR t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c $60{}^\\circ $, m\u00e0 g\u00f3c t\u1edbi l\u1ea1i b\u1eb1ng g\u00f3c ph\u1ea3n x\u1ea1 n\u00ean gi\u00e1 tr\u1ecb g\u00f3c t\u1edbi b\u1eb1ng g\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng: i = r = 60:2 = $30{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2112},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t m\u1eb7t g\u01b0\u01a1ng ph\u1eb3ng. G\u00f3c ph\u1ea3n x\u1ea1 r c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. r = $90{}^\\circ $","B. r = $45{}^\\circ $","C. r = $180{}^\\circ $","D. r = $0{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>V\u00ec khi chi\u1ebfu tia t\u1edbi vu\u00f4ng g\u00f3c m\u1ed9t m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng, tia t\u1edbi tr\u00f9ng v\u1edbi ph\u00e1p tuy\u1ec3n, g\u00f3c t\u1edbi b\u1eb1ng g\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng $0{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2113},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"N\u1ed9i dung n\u00e0o sau \u0111\u00e2y kh\u00f4ng thu\u1ed9c v\u1ec1 \u0110\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng:","select":["A. G\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng g\u00f3c t\u1edbi.","B. Tia ph\u1ea3n x\u1ea1 n\u1eb1m trong g\u01b0\u01a1ng ph\u1eb3ng ch\u1ee9a tia t\u1edbi v\u00e0 \u0111\u01b0\u1eddng ph\u00e1p tuy\u1ebfn c\u1ee7a g\u01b0\u01a1ng \u1edf \u0111i\u1ec3m t\u1edbi","C. G\u00f3c ph\u1ea3n x\u1ea1 nh\u1ecf h\u01a1n g\u00f3c t\u1edbi.","D. Ph\u01b0\u01a1ng c\u1ee7a tia t\u1edbi x\u00e1c \u0111\u1ecbnh b\u1eb1ng g\u00f3c SIN = i g\u1ecdi l\u00e0 g\u00f3c t\u1edbi."],"hint":"","explain":"<span class='basic_left'>G\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng g\u00f3c t\u1edbi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2114},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"V\u1eadt kh\u00f4ng c\u00f3 b\u1ec1 m\u1eb7t ph\u1eb3ng, nh\u1eb5n b\u00f3ng kh\u00f4ng th\u1ec3 d\u00f9ng \u0111\u1ec3 soi \u1ea3nh c\u1ee7a m\u00ecnh nh\u01b0 m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng l\u00e0:","select":["A. M\u1eb7t n\u01b0\u1edbc y\u00ean t\u0129nh","B. M\u1eb7t \u0111\u00e1 \u1ed1p l\u00e1t s\u1ea7n","C. B\u1ea3n kim lo\u1ea1i nh\u1eb5n b\u00f3ng","D. T\u1ea5m kim lo\u1ea1i ph\u1eb3ng b\u00f3ng "],"hint":"","explain":"<span class='basic_left'>M\u1eb7t \u0111\u00e1 \u1ed1p l\u00e1t s\u1ea7n kh\u00f4ng c\u00f3 b\u1ec1 m\u1eb7t ph\u1eb3ng, nh\u1eb5n b\u00f3ng kh\u00f4ng th\u1ec3 d\u00f9ng \u0111\u1ec3 soi \u1ea3nh c\u1ee7a m\u00ecnh nh\u01b0 m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2115},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia t\u1edbi l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng v\u1edbi g\u00f3c t\u1edbi i = $30{}^\\circ $. Trong c\u00e1c c\u00e2u sau \u0111\u00e2y th\u00ec c\u00e2u n\u00e0o sai?","select":["A. G\u00f3c ph\u1ea3n x\u1ea1 i\u2019 = $30{}^\\circ $","B. i + i\u2019 = $30{}^\\circ $","C. i\u2019 + b = $90{}^\\circ $","D. a = b = $60{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 i = i\u2019 = $30{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2116},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h1.jpg'\/><\/center>Khi g\u01b0\u01a1ng \u0111\u1eb7t t\u1ea1i A, g\u00f3c gi\u1eefa tia t\u1edbi v\u00e0 g\u01b0\u01a1ng b\u1eb1ng bao nhi\u00eau \u0111\u1ed9 \u0111\u1ec3 tia ph\u1ea3n x\u1ea1 \u0111i th\u1eb3ng \u0111\u1ee9ng v\u00e0o gi\u1ebfng (t\u1ea1i \u0111i\u1ec3m R) ?","select":["A. $60{}^\\circ $","B. $30{}^\\circ $","C. $45{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Theo \u0111\u1ec1 b\u00e0i g\u00f3c SIR = $90{}^\\circ $. V\u1eady g\u00f3c i = $45{}^\\circ $. N\u00ean g\u00f3c gi\u1eefa tia t\u1edbi v\u00e0 g\u01b0\u01a1ng b\u1eb1ng $90{}^\\circ $ - $45{}^\\circ $ = $45{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2117},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ch\u1ecdn g\u00f3c \u0111o th\u00edch h\u1ee3p \u0111\u1ec3 \u0111i\u1ec1n v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/> Khi tia t\u1edbi c\u00f3 g\u00f3c t\u1edbi b\u1eb1ng............ th\u00ec tia ph\u1ea3n x\u1ea1 g\u1ea7n nh\u01b0 th\u1eb3ng h\u00e0ng v\u1edbi tia t\u1edbi.","select":["A. $60{}^\\circ $","B. $30{}^\\circ $","C. $45{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Khi tia t\u1edbi c\u00f3 g\u00f3c t\u1edbi b\u1eb1ng $90{}^\\circ $ th\u00ec tia ph\u1ea3n x\u1ea1 g\u1ea7n nh\u01b0 th\u1eb3ng h\u00e0ng v\u1edbi tia t\u1edbi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2118},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ch\u1ecdn m\u1ed9t ph\u00e1t bi\u1ec3u \u0111\u00fang v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa tia t\u1edbi v\u00e0 tia ph\u1ea3n x\u1ea1.","select":["A. Khi tia t\u1edbi c\u00f3 g\u00f3c t\u1edbi i = $0{}^\\circ $ th\u00ec tia ph\u1ea3n x\u1ea1 c\u00f3 ph\u01b0\u01a1ng tr\u00f9ng v\u1edbi tia t\u1edbi","B. Khi tia t\u1edbi c\u00f3 g\u00f3c t\u1edbi i = $45{}^\\circ $th\u00ec tia ph\u1ea3n x\u1ea1 c\u00f3 ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi tia t\u1edbi.","C. Khi tia t\u1edbi c\u00f3 g\u00f3c t\u1edbi i = $90{}^\\circ $ th\u00ec tia ph\u1ea3n x\u1ea1 g\u1ea7n nh\u01b0 th\u1eb3ng h\u00e0ng v\u1edbi tia t\u1edbi.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2119},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ch\u1ecdn m\u1ed9t ph\u00e1t bi\u1ec3u kh\u00f4ng \u0111\u00fang v\u1ec1 \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a tia s\u00e1ng:","select":["A. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t nh\u01b0ng kh\u00f4ng \u0111\u1ed3ng t\u00ednh, \u00e1nh s\u00e1ng kh\u00f4ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng.","B. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh, \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng.","C. Tia s\u00e1ng l\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n \u00e1nh s\u00e1ng b\u1eb1ng \u0111\u01b0\u1eddng th\u1eb3ng c\u00f3 m\u0169i t\u00ean ch\u1ec9 h\u01b0\u1edbng.","D. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t nh\u01b0ng kh\u00f4ng \u0111\u1ed3ng t\u00ednh, \u00e1nh s\u00e1ng lu\u00f4n truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng."],"hint":"","explain":"<span class='basic_left'>Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t nh\u01b0ng kh\u00f4ng \u0111\u1ed3ng t\u00ednh, \u00e1nh s\u00e1ng kh\u00f4ng th\u1ec3 truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2120},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng ta thu \u0111\u01b0\u1ee3c m\u1ed9t tia ph\u1ea3n x\u1ea1 t\u1ea1o v\u1edbi tia t\u1edbi m\u1ed9t g\u00f3c $40{}^\\circ $. G\u00f3c t\u1edbi c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $20{}^\\circ $","B. $80{}^\\circ $","C. $40{}^\\circ $","D. $60{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>G\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng g\u00f3c t\u1edbi, m\u00e0 i + i' = $40{}^\\circ $, n\u00ean i = i' = $20{}^\\circ $.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2121},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t g\u01b0\u01a1ng ph\u1eb3ng. G\u00f3c ph\u1ea3n x\u1ea1 r c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $90{}^\\circ $","B. $45{}^\\circ $","C. $180{}^\\circ $","D. $0{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu m\u1ed9t tia s\u00e1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t g\u01b0\u01a1ng ph\u1eb3ng, n\u00ean tia t\u1edbi t\u1ea1o v\u1edbi ph\u00e1p tuy\u1ebfn g\u00f3c $0{}^\\circ $. G\u00f3c t\u1edbi b\u1eb1ng $0{}^\\circ $ n\u00ean g\u00f3c ph\u1ea3n x\u1ea1 b\u1eb1ng $0{}^\\circ $.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2122},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng, tia ph\u1ea3n x\u1ea1 thu \u0111\u01b0\u1ee3c n\u1eb1m trong m\u1eb7t ph\u1eb3ng n\u00e0o?","select":["A. M\u1eb7t g\u01b0\u01a1ng","B. M\u1eb7t ph\u1eb3ng t\u1ea1o b\u1edfi tia t\u1edbi v\u00e0 m\u1eb7t g\u01b0\u01a1ng","C. M\u1eb7t ph\u1eb3ng t\u1ea1o b\u1edfi tia t\u1edbi v\u00e0 ph\u00e1p tuy\u1ebfn v\u1edbi g\u01b0\u01a1ng \u1edf \u0111i\u1ec3m t\u1edbi","D. M\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi tia t\u1edbi"],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng, tia ph\u1ea3n x\u1ea1 thu \u0111\u01b0\u1ee3c n\u1eb1m trong m\u1eb7t ph\u1eb3ng t\u1ea1o b\u1edfi tia t\u1edbi v\u00e0 ph\u00e1p tuy\u1ebfn v\u1edbi g\u01b0\u01a1ng \u1edf \u0111i\u1ec3m t\u1edbi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2123},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"V\u1eadn t\u1ed1c \u00e1nh s\u00e1ng khi truy\u1ec1n trong kh\u00f4ng kh\u00ed c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng 300 000 000 m\/s, kho\u1ea3ng c\u00e1ch t\u1eeb M\u1eb7t Tr\u1eddi \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t kho\u1ea3ng 150 000 000 km. Th\u1eddi gian \u00e1nh s\u00e1ng truy\u1ec1n t\u1eeb M\u1eb7t Tr\u1eddi \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t l\u00e0:","select":["A. 5 s","B. 50 s","C. 500 s","D. 5000 s"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed5i 150 000 000 km = 150 000 000 000 m.<br\/>Th\u1eddi gian \u00e1nh s\u00e1ng truy\u1ec1n t\u1eeb M\u1eb7t Tr\u1eddi \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t l\u00e0: $\\dfrac{150 000 000 000}{300 000 000}=500$ s<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2124},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h2.jpg'\/><\/center>Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI theo ph\u01b0\u01a1ng n\u1eb1m ngang l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng nh\u01b0 h\u00ecnh tr\u00ean, ta thu \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng. G\u00f3c SIM t\u1ea1o b\u1edfi tia SI v\u00e0 m\u1eb7t g\u01b0\u01a1ng c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $30{}^\\circ $","B. $45{}^\\circ $","C. $60{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI theo ph\u01b0\u01a1ng n\u1eb1m ngang l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng nh\u01b0 h\u00ecnh tr\u00ean, ta thu \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng, n\u00f3 s\u1ebd vu\u00f4ng g\u00f3c v\u1edbi tia t\u1edbi SI t\u1ea1o th\u00e0nh g\u00f3c $90{}^\\circ $. Hai g\u00f3c b\u00ean c\u1ea1nh s\u1ebd c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau n\u00ean g\u00f3c SIM b\u1eb1ng $45{}^\\circ $<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2125},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t tia s\u00e1ng SI l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng, tia ph\u1ea3n x\u1ea1 thu \u0111\u01b0\u1ee3c n\u1eb1m trong m\u1eb7t ph\u1eb3ng n\u00e0o?","select":["A. m\u1eb7t g\u01b0\u01a1ng","B. m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi tia t\u1edbi v\u00e0 m\u1eb7t g\u01b0\u01a1ng","C. m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi tia t\u1edbi","D. m\u1eb7t ph\u1eb3ng t\u1ea1o b\u1edfi tia t\u1edbi v\u00e0 ph\u00e1p tuy\u1ebfn v\u1edbi g\u01b0\u01a1ng \u1edf \u0111i\u1ec3m t\u1edbi"],"hint":"","explain":"<span class='basic_left'>Khi chi\u1ebfu m\u1ed9t tia s\u00e1ng SI l\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng tia ph\u1ea3n x\u1ea1 thu \u0111\u01b0\u1ee3c n\u1eb1m trong m\u1eb7t ph\u1eb3ng t\u1ea1o b\u1edfi tia t\u1edbi v\u00e0 ph\u00e1p tuy\u1ebfn v\u1edbi g\u01b0\u01a1ng \u1edf \u0111i\u1ec3m t\u1edbi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2126},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h3.jpg'\/><\/center>M\u1ed9t tia t\u1edbi t\u1ea1o v\u1edbi m\u1eb7t g\u01b0\u01a1ng m\u1ed9t g\u00f3c $120{}^\\circ $ nh\u01b0 \u1edf h\u00ecnh tr\u00ean. G\u00f3c ph\u1ea3n x\u1ea1 r c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $120{}^\\circ $","B. $45{}^\\circ $","C. $30{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>K\u1ebb ph\u00e1p tuy\u1ebfn IN vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng g\u01b0\u01a1ng t\u1ea1o v\u1edbi g\u01b0\u01a1ng m\u1ed9t g\u00f3c $90{}^\\circ $. ta c\u00f3 g\u00f3c t\u1edbi i = SIN b\u1eb1ng: 120 \u2013 90 = $30{}^\\circ $<br\/>Do g\u00f3c t\u1edbi b\u1eb1ng g\u00f3c ph\u1ea3n x\u1ea1 n\u00ean g\u00f3c ph\u1ea3n x\u1ea1 : i = r = $30{}^\\circ $ <br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2127},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h4.jpg'\/><\/center>Hai g\u01b0\u01a1ng ph\u1eb3ng ${{G}_{1}}$ v\u00e0 ${{G}_{2}}$ \u0111\u1eb7t song song v\u1edbi nhau, m\u1eb7t ph\u1ea3n x\u1ea1 quay v\u00e0o nhau. Tia t\u1edbi SI \u0111\u01b0\u1ee3c chi\u1ebfu l\u00ean g\u01b0\u01a1ng ${{G}_{1}}$ ph\u1ea3n x\u1ea1 m\u1ed9t l\u1ea7n tr\u00ean g\u01b0\u01a1ng ${{G}_{1}}$ v\u00e0 m\u1ed9t l\u1ea7n tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ ( h\u00ecnh tr\u00ean). G\u00f3c t\u1ea1o b\u1edfi tia t\u1edbi SI v\u00e0 tia ph\u1ea3n x\u1ea1 cu\u1ed1i c\u00f9ng tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $0{}^\\circ $","B. $45{}^\\circ $","C. $60{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Gi\u1ea3 s\u1eed tia t\u1edbi l\u00e0 SI c\u00f3 g\u00f3c t\u1edbi l\u00e0 \u03b1 \u0111\u1ed9, g\u00f3c ph\u1ea3n x\u1ea1 c\u0169ng b\u1eb1ng g\u00f3c t\u1edbi b\u1eb1ng \u03b1 \u0111\u1ed9. Do hai g\u01b0\u01a1ng \u0111\u1eb7t song song v\u1edbi nhau n\u00ean ph\u00e1p tuy\u1ebfn \u1edf g\u01b0\u01a1ng ${{G}_{1}}$ v\u00e0 ph\u00e1p tuy\u1ebfn \u1edf g\u01b0\u01a1ng ${{G}_{2}}$ song song v\u1edbi nhau, tia ph\u1ea3n x\u1ea1 \u1edf ${{G}_{1}}$ ch\u00ednh l\u00e0 tia t\u1edbi \u1edf g\u01b0\u01a1ng ${{G}_{2}}$ .Ta c\u00f3 g\u00f3c t\u1edbi \u1edf ${{G}_{2}}$ b\u1eb1ng g\u00f3c ph\u1ea3n x\u1ea1 \u1edf g\u01b0\u01a1ng ${{G}_{1}}$ v\u00ec hai g\u01b0\u01a1ng song song v\u1edbi nhau b\u1eb1ng \u03b1 \u0111\u1ed9. Ph\u00e1p tuy\u1ebfn g\u01b0\u01a1ng ${{G}_{2}}$ song song v\u1edbi g\u01b0\u01a1ng ${{G}_{1}}$ n\u00ean tia ph\u1ea3n x\u1ea1 \u1edf g\u01b0\u01a1ng ${{G}_{2}}$ c\u0169ng song song v\u1edbi tia t\u1edbi SI \u1edf g\u01b0\u01a1ng ${{G}_{1}}$ . N\u00ean g\u00f3c t\u1ea1o b\u1edfi tia t\u1edbi SI v\u00e0 tia ph\u1ea3n x\u1ea1 cu\u1ed1i c\u00f9ng tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ c\u00f3 gi\u00e1 tr\u1ecb $0{}^\\circ $.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2128},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai4/lv2/img\/h5.jpg'\/><\/center>Hai g\u01b0\u01a1ng ph\u1eb3ng ${{G}_{1}}$ v\u00e0 ${{G}_{2}}$ \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi nhau, m\u1eb7t ph\u1ea3n x\u1ea1 quay v\u00e0o nhau. Tia t\u1edbi SI \u0111\u01b0\u1ee3c chi\u1ebfu l\u00ean g\u01b0\u01a1ng ${{G}_{1}}$ ( h\u00ecnh tr\u00ean) l\u1ea7n l\u01b0\u1ee3t ph\u1ea3n x\u1ea1 m\u1ed9t l\u1ea7n tr\u00ean g\u01b0\u01a1ng ${{G}_{1}}$ r\u1ed3i tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ . G\u00f3c t\u1ea1o b\u1edfi tia t\u1edbi SI v\u00e0 tia ph\u1ea3n x\u1ea1 cu\u1ed1i c\u00f9ng tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o sau \u0111\u00e2y?","select":["A. $180{}^\\circ $","B. $45{}^\\circ $","C. $60{}^\\circ $","D. $90{}^\\circ $"],"hint":"","explain":"<span class='basic_left'>Do hai g\u01b0\u01a1ng \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi nhau n\u00ean hai ph\u00e1p tuy\u1ebfn ${{N}_{1}}$ v\u00e0 ${{N}_{2}}$ c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi nhau. Tia t\u1edbi SI song song v\u1edbi tia ph\u1ea3n x\u1ea1 JR. G\u00f3c t\u1ea1o b\u1edfi tia t\u1edbi SI v\u00e0 tia ph\u1ea3n x\u1ea1 cu\u1ed1i c\u00f9ng tr\u00ean g\u01b0\u01a1ng ${{G}_{2}}$ c\u00f3 gi\u00e1 tr\u1ecb $180{}^\\circ $.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2129},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt c\u1ea3n \u0111\u01b0\u1ee3c \u0111\u1eb7t trong kho\u1ea3ng gi\u1eefa m\u1ed9t b\u00f3ng \u0111i\u1ec7n d\u00e2y t\u00f3c \u0111ang s\u00e1ng v\u00e0 m\u1ed9t m\u00e0n ch\u1eafn. K\u00edch th\u01b0\u1edbc c\u1ee7a b\u00f3ng n\u1eeda t\u1ed1i thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o khi \u0111\u01b0a v\u1eadt c\u1ea3n l\u1ea1i g\u1ea7n m\u00e0n ch\u1eafn h\u01a1n?","select":["A. T\u0103ng l\u00ean","B. Gi\u1ea3m \u0111i","C. L\u00fac \u0111\u1ea7u t\u0103ng l\u00ean, sau gi\u1ea3m \u0111i","D. Kh\u00f4ng thay \u0111\u1ed5i"],"hint":"","explain":"<span class='basic_left'>M\u1ed9t v\u1eadt c\u1ea3n \u0111\u01b0\u1ee3c \u0111\u1eb7t trong kho\u1ea3ng gi\u1eefa m\u1ed9t b\u00f3ng \u0111i\u1ec7n d\u00e2y t\u00f3c \u0111ang s\u00e1ng v\u00e0 m\u1ed9t m\u00e0n ch\u1eafn. K\u00edch th\u01b0\u1edbc c\u1ee7a b\u00f3ng n\u1eeda t\u1ed1i l\u00fac \u0111\u1ea7u t\u0103ng l\u00ean, sau gi\u1ea3m \u0111i khi \u0111\u01b0a v\u1eadt c\u1ea3n l\u1ea1i g\u1ea7n m\u00e0n ch\u1eafn h\u01a1n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2130}],"lesson":{"save":0,"level":2}}