{"segment":[{"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":"Ch\u00f9m s\u00e1ng do d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n pin (\u0111\u00e8n \u0111ang b\u1eadt s\u00e1ng) ph\u00e1t ra c\u00f3 t\u00ednh ch\u1ea5t n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?","select":["A. Song song","B. Ph\u00e2n k\u00ec","C. H\u1ed9i t\u1ee5","D. \u0110\u1ea7u ti\u00ean h\u1ed9i t\u1ee5 sau \u0111\u00f3 ph\u00e2n k\u00ec"],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m s\u00e1ng do d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n pin (\u0111\u00e8n \u0111ang b\u1eadt s\u00e1ng) ph\u00e1t ra c\u00f3 t\u00ednh ph\u00e2n k\u00ec.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2071},{"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":"Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p sau, tr\u01b0\u1eddng h\u1ee3p n\u00e0o \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng?","select":["A. \u00c1nh s\u00e1ng truy\u1ec1n t\u1eeb M\u1eb7t Tr\u1eddi \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t","B. \u00c1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n truy\u1ec1n \u0111\u1ebfn m\u1eaft ta","C. \u00c1nh s\u00e1ng truy\u1ec1n t\u1eeb kh\u00f4ng kh\u00ed v\u00e0o ch\u1eadu n\u01b0\u1edbc","D. A,B \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>Trong m\u1ed9t m\u00f4i tr\u01b0\u1eddng nh\u01b0 nhau t\u1ea1i m\u1ecdi \u0111i\u1ec3m (\u0111\u1ed3ng ch\u1ea5t), \u00e1nh s\u00e1ng truy\u1ec1n theo m\u1ed9t \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":2072},{"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":"Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y, \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng?","select":["A. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t","B. \u0110i t\u1eeb m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t n\u00e0y sang m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t kh\u00e1c","C. Trong m\u00f4i tr\u01b0\u1eddng \u0111\u1ed3ng t\u00ednh","D. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh"],"hint":"","explain":"<span class='basic_left'>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. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2073},{"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":"Tr\u00ean h\u00ecnh v\u1ebd bi\u1ec3u di\u1ec5n c\u00e1c tia s\u00e1ng, m\u0169i t\u00ean cho ta bi\u1ebft \u0111i\u1ec1u g\u00ec ?","select":["A. \u00c1nh s\u00e1ng \u0111ang chuy\u1ec3n \u0111\u1ed9ng","B. \u00c1nh s\u00e1ng m\u1ea1nh hay y\u1ebfu","C. \u00c1nh s\u00e1ng truy\u1ec1n \u0111i nhanh hay ch\u1eadm","D. H\u01b0\u1edbng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng"],"hint":"","explain":"<span class='basic_left'>Tr\u00ean h\u00ecnh v\u1ebd bi\u1ec3u di\u1ec5n c\u00e1c tia s\u00e1ng, m\u0169i t\u00ean cho ta bi\u1ebft h\u01b0\u1edbng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2074},{"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":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0 ch\u1ed7 tr\u1ed1ng:<br\/> Chu\u0300m sa\u0301ng song song g\u00f4\u0300m ............... tr\u00ean \u0111\u01b0\u01a1\u0300ng truy\u00ea\u0300n cu\u0309a chu\u0301ng.","select":["A. ca\u0301c tia sa\u0301ng giao nhau","B. ca\u0301c tia sa\u0301ng kh\u00f4ng giao nhau","C. ca\u0301c tia sa\u0301ng ch\u1ec9 c\u1eaft nhau m\u1ed9t l\u1ea7n","D. ca\u0301c tia sa\u0301ng loe r\u00f4\u0323ng ra"],"hint":"","explain":"<span class='basic_left'>Chu\u0300m sa\u0301ng song song g\u00f4\u0300m ca\u0301c tia sa\u0301ng kh\u00f4ng giao nhau tr\u00ean \u0111\u01b0\u01a1\u0300ng truy\u00ea\u0300n cu\u0309a chu\u0301ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2075},{"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":2076},{"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\u00f9m tia song song l\u00e0 ch\u00f9m tia g\u1ed3m c\u00e1c tia s\u00e1ng?","select":["A. Kh\u00f4ng giao nhau","B. G\u1eb7p nhau \u1edf v\u00f4 c\u1ef1c","C. Kh\u00f4ng h\u1ed9i t\u1ee5 c\u0169ng kh\u00f4ng ph\u00e2n k\u00ec","D. C\u00e1c c\u00e2u A, B, C \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m tia song song l\u00e0 ch\u00f9m tia g\u1ed3m c\u00e1c tia s\u00e1ng kh\u00f4ng giao nhau hay c\u00f2n g\u1ecdi l\u00e0 g\u1eb7p nhau \u1edf v\u00f4 c\u1ef1c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2077},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Ch\u1ecdn c\u00e2u sai:","select":["A. Tia s\u00e1ng l\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng. \u0110\u01b0\u1eddng \u0111i c\u1ee7a tia s\u00e1ng gi\u1eefa hai \u0111i\u1ec3m l\u00e0 \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t c\u1ee7a hai \u0111i\u1ec3m \u0111\u00f3.","B. Ch\u00f9m tia ph\u00e2n k\u1ef3 l\u00e0 ch\u00f9m c\u00e1c tia s\u00e1ng giao nhau tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a ch\u00fang.","C. Ngu\u1ed3n s\u00e1ng l\u00e0 c\u00e1c v\u1eadt t\u1ef1 ph\u00e1t ra \u00e1nh s\u00e1ng.","D. C\u00e1c v\u1eadt s\u00e1ng g\u1ed3m c\u00e1c ngu\u1ed3n s\u00e1ng v\u00e0 c\u00e1c v\u1eadt \u0111\u01b0\u1ee3c chi\u1ebfu s\u00e1ng."],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m tia ph\u00e2n k\u1ef3 l\u00e0 ch\u00f9m c\u00e1c tia s\u00e1ng giao nhau tr\u00ean \u0111\u01b0\u1eddng k\u00e9o d\u00e0i c\u1ee7a ch\u00fang.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2078},{"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 c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang:","select":["A. Ch\u00f9m tia ph\u00e2n k\u00ec l\u00e0 ch\u00f9m s\u00e1ng ph\u00e1t ra t\u1eeb ngu\u1ed3n \u0111i\u1ec3m","B. Ch\u00f9m tia h\u1ed9i t\u1ee5 l\u00e0 ch\u00f9m s\u00e1ng m\u00e0 trong \u0111\u00f3 c\u00e1c tia s\u00e1ng \u0111\u1ed3ng qui t\u1ea1i m\u1ed9t \u0111i\u1ec3m","C. Ch\u00f9m tia song song l\u00e0 ch\u00f9m g\u1ed3m c\u00e1c tia s\u00e1ng song song coi nh\u01b0 ph\u00e1t ra t\u1eeb v\u1eadt \u1edf xa","D. A, B, C \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>C\u1ea3 ba \u0111\u00e1p \u00e1n A,B,C \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":2079},{"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":"Ch\u1ecdn c\u00e2u \u0111\u00fang: ","select":["A. Ch\u00f9m s\u00e1ng song song g\u1ed3m c\u00e1c tia s\u00e1ng giao nhau tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a ch\u00fang","B. Ch\u00f9m s\u00e1ng c\u00e0ng xa c\u00e0ng loe r\u1ed9ng ra \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ch\u00f9m ph\u00e2n k\u00ec","C. Ch\u00f9m s\u00e1ng xu\u1ea5t ph\u00e1t t\u1eeb b\u00f3ng \u0111\u00e8n tr\u00f2n l\u00e0 ch\u00f9m h\u1ed9i t\u1ee5","D. Ch\u00f9m s\u00e1ng xu\u1ea5t ph\u00e1t t\u1eeb b\u00f3ng \u0111\u00e8n d\u00e0i l\u00e0 ch\u00f9m s\u00e1ng song song"],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m s\u00e1ng c\u00e0ng xa c\u00e0ng loe r\u1ed9ng ra \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ch\u00f9m ph\u00e2n k\u00ec.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2080},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ch\u1ecdn \u0111\u00e1p \u00e1n sai: ","select":["A. \u00c1nh s\u00e1ng ph\u00e1t ra t\u1eeb ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5 s\u1ebd g\u1eb7p nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m","B. \u00c1nh s\u00e1ng ph\u00e1t ra t\u1eeb ch\u00f9m s\u00e1ng song song th\u00ec kh\u00f4ng th\u1ec3 c\u1eaft nhau","C. Trong ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5, c\u00e1c tia s\u00e1ng \u0111\u1ec1u xu\u1ea5t ph\u00e1t t\u1eeb c\u00f9ng m\u1ed9t \u0111i\u1ec3m","D. Trong ch\u00f9m s\u00e1ng ph\u00e2n k\u00ec, kho\u1ea3ng c\u00e1ch c\u00e0ng xa ngu\u1ed3n th\u00ec ch\u00f9m s\u00e1ng c\u00e0ng loe r\u1ed9ng"],"hint":"","explain":"<span class='basic_left'>Trong ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5, c\u00e1c tia s\u00e1ng \u0111\u1ec1u h\u1ed9i t\u1ee5 t\u1ea1i c\u00f9ng m\u1ed9t \u0111i\u1ec3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2081},{"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/bai2/lv2/img\/h0.jpg'\/><\/center>H\u00ecnh n\u00e0o v\u1ebd \u0111\u00fang \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng t\u1eeb kh\u00f4ng kh\u00ed v\u00e0o n\u01b0\u1edbc ? ","select":["A. H\u00ecnh A","B. H\u00ecnh B","C. H\u00ecnh C","D. H\u00ecnh D"],"hint":"","explain":"<span class='basic_left'>Tia s\u00e1ng \u0111i t\u1eeb kh\u00f4ng kh\u00ed v\u00e0o n\u01b0\u1edbc b\u1ecb b\u1ebb cong (t\u1ea1o th\u00e0nh tia g\u1ea5p kh\u00fac).<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2082},{"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":"Em h\u00e3y \u0111i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o c\u00e1c ch\u1ed7 tr\u1ed1ng trong c\u00e2u sau:<br\/>Trong m\u00f4i tr\u01b0\u1eddng (1)\u2026\u2026\u2026\u2026v\u00e0(2)\u2026\u2026\u2026\u2026\u2026\u2026\u2026..\u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo c\u00e1c (3)\u2026\u2026\u2026\u2026","select":["A. (1)- n\u01b0\u1edbc,(2)- kh\u00f4ng kh\u00ed,(3) - \u0111\u01b0\u1eddng cong","B. (1)- trong su\u1ed1t,(2)- kh\u00f4ng kh\u00ed,(3)- kh\u00f4ng \u0111\u1ed3ng t\u00ednh","C. (1) - trong su\u1ed1t,(2)- \u0111\u1ed3ng t\u00ednh,(3)- \u0111\u01b0\u1eddng th\u1eb3ng","D. (1)- l\u1ecfng,(2) - kh\u00ed,(3)- \u0111\u01b0\u1eddng th\u1eb3ng"],"hint":"","explain":"<span class='basic_left'>Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh, \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2083},{"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/bai2/lv2/img\/h1.jpg'\/><\/center>H\u00ecnh v\u1ebd n\u00e0o d\u01b0\u1edbi \u0111\u00e2y bi\u1ec3u di\u1ec5n \u0111\u00fang ch\u00f9m tia s\u00e1ng ph\u00e1t ra t\u1eeb d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n \u0111ang s\u00e1ng?","select":["A. H\u00ecnh A","B. H\u00ecnh B","C. H\u00ecnh C","D. H\u00ecnh D"],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m s\u00e1ng ph\u00e1t ra l\u00e0 ch\u00f9m ph\u00e2n k\u00ec.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2084},{"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":"Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u00e1nh s\u00e1ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng?","select":["A. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t","B. \u0110i t\u1eeb m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t n\u00e0y sang m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t kh\u00e1c","C. Trong m\u00f4i tr\u01b0\u1eddng \u0111\u1ed3ng t\u00ednh","D. Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh"],"hint":"","explain":"<span class='basic_left'>Trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh \u00e1nh s\u00e1ng 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":2085},{"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":"Ch\u00f9m s\u00e1ng do d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n pin (\u0111\u00e8n \u0111ang b\u1eadt s\u00e1ng) ph\u00e1t ra c\u00f3 t\u00ednh ch\u1ea5t n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?","select":["A. Song song","B. Ph\u00e2n k\u00ec","C. H\u1ed9i t\u1ee5","D. \u0110\u1ea7u ti\u00ean h\u1ed9i t\u1ee5, sau \u0111\u00f3 ph\u00e2n k\u00ec"],"hint":"","explain":"<span class='basic_left'>Ch\u00f9m s\u00e1ng do d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n pin (\u0111\u00e8n \u0111ang b\u1eadt s\u00e1ng) ph\u00e1t ra c\u00f3 t\u00ednh ch\u1ea5t ph\u00e2n k\u1ef3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2086},{"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/bai2/lv2/img\/h2.jpg'\/><\/center>\u0110\u1eb7t m\u1ed9t b\u00f3ng \u0111\u00e8n pin \u0111ang b\u1eadt s\u00e1ng tr\u01b0\u1edbc m\u1ed9t t\u1ea5m b\u00eca c\u00f3 \u0111\u1ee5c m\u1ed9t l\u1ed7 th\u1ee7ng nh\u1ecf O. Ph\u1ea3i \u0111\u1eb7t m\u1eaft \u1edf v\u1ecb tr\u00ed n\u00e0o b\u00ean kia t\u1ea5m b\u00eca \u0111\u1ec3 c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n.","select":["A. \u1edf I","B. \u1edf H","C. \u1edf K","D. \u1edf L"],"hint":"","explain":"<span class='basic_left'>V\u00ec trong m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00e0 \u0111\u1ed3ng t\u00ednh \u00e1nh s\u00e1ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng. \u00e1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n pin truy\u1ec1n qua l\u1ed7 th\u1ee7ng nh\u1ecf O sau \u0111\u00f3 l\u00e0 truy\u1ec1n th\u1eb3ng t\u1edbi H. V\u00ec v\u1eady \u0111\u1eb7t m\u1eaft \u1edf v\u1ecb tr\u00ed H b\u00ean kia t\u1ea5m b\u00eca c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2087},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai2/lv2/img\/h0.jpg'\/><\/center>Tr\u00ean h\u00ecnh bi\u1ec3u di\u1ec5n c\u00e1c tia s\u00e1ng, m\u0169i t\u00ean cho ta bi\u1ebft \u0111i\u1ec1u g\u00ec? ","select":["A. \u00e1nh s\u00e1ng \u0111ang chuy\u1ec3n \u0111\u1ed9ng","B. \u00e1nh s\u00e1ng m\u1ea1nh hay y\u1ebfu","C. \u00e1nh s\u00e1ng truy\u1ec1n \u0111i nhanh hay ch\u1eadm","D. h\u01b0\u1edbng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng"],"hint":"","explain":"<span class='basic_left'>Tr\u00ean h\u00ecnh bi\u1ec3u di\u1ec5n c\u00e1c tia s\u00e1ng, m\u0169i t\u00ean cho ta bi\u1ebft \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a tia s\u00e1ng hay h\u01b0\u1edbng truy\u1ec1n c\u1ee7a \u00e1nh s\u00e1ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2088},{"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/bai2/lv2/img\/h3.jpg'\/><\/center>M\u1ed9t ng\u01b0\u1eddi \u0111\u1eb7t m\u1eaft \u1edf g\u1ea7n l\u1ed7 nh\u1ecf A tr\u00ean th\u00e0nh h\u1ed9p nh\u00ecn v\u00e0o trong h\u1ed9p, ng\u01b0\u1eddi \u0111\u00f3 c\u00f3 nh\u00ecn th\u1ea5y b\u00f3ng \u0111\u00e8n kh\u00f4ng?","select":["A. Ng\u01b0\u1eddi \u0111\u00f3 kh\u00f4ng nh\u00ecn th\u1ea5y b\u00f3ng \u0111\u00e8n v\u00ec \u00e1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n kh\u00f4ng truy\u1ec1n v\u00e0o m\u1eaft ng\u01b0\u1eddi \u0111\u00f3.","B. Ng\u01b0\u1eddi \u0111\u00f3 nh\u00ecn th\u1ea5y b\u00f3ng \u0111\u00e8n v\u00ec \u00e1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n kh\u00f4ng truy\u1ec1n v\u00e0o m\u1eaft ng\u01b0\u1eddi \u0111\u00f3.","C. Ng\u01b0\u1eddi \u0111\u00f3 kh\u00f4ng nh\u00ecn th\u1ea5y b\u00f3ng \u0111\u00e8n v\u00ec \u00e1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n truy\u1ec1n v\u00e0o m\u1eaft ng\u01b0\u1eddi \u0111\u00f3.","D. Ng\u01b0\u1eddi \u0111\u00f3 nh\u00ecn th\u1ea5y b\u00f3ng \u0111\u00e8n v\u00ec \u00e1nh s\u00e1ng t\u1eeb b\u00f3ng \u0111\u00e8n truy\u1ec1n v\u00e0o m\u1eaft ng\u01b0\u1eddi \u0111\u00f3."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u00e1nh s\u00e1ng \u0111\u00e8n ph\u00e1t ra truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng CA. M\u1eaft \u1edf b\u00ean d\u01b0\u1edbi \u0111\u01b0\u1eddng CA n\u00ean \u00e1nh s\u00e1ng kh\u00f4ng truy\u1ec1n v\u00e0o m\u1eaft \u0111\u01b0\u1ee3c. Ph\u1ea3i \u0111\u1ec3 m\u1eaft n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng th\u1eb3ng CA.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2089},{"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":"Trong kh\u00f4ng kh\u00ed \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng n\u00e0o ?","select":["A. Theo \u0111\u01b0\u1eddng v\u00f2ng.","B. Theo \u0111\u01b0\u1eddng th\u1eb3ng.","C. Theo \u0111\u01b0\u1eddng d\u00edch d\u1eafc.","D. Theo \u0111\u01b0\u1eddng cong b\u1ea5t k\u00ec."],"hint":"","explain":"<span class='basic_left'>Trong kh\u00f4ng kh\u00ed \u00e1nh s\u00e1ng truy\u1ec1n \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2090}],"lesson":{"save":0,"level":2}}