{"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":"\u1ea2nh \u1ea3o c\u1ee7a v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 nh\u1eefng t\u00ednh ch\u1ea5t n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?","select":["A. L\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng v\u1eadt","B. L\u1edbn h\u01a1n v\u1eadt","C. Nh\u1ecf h\u01a1n v\u1eadt","D. Nh\u1ecf h\u01a1n \u1ea3nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i"],"hint":"","explain":"<span class='basic_left'>\u1ea2nh \u1ea3o c\u1ee7a v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u1edbn h\u01a1n v\u1eadt.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2171},{"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 ch\u00f9m tia t\u1edbi song song l\u00ean m\u1ed9t g\u01b0\u01a1ng c\u1ea7u l\u00f5m, ta thu \u0111\u01b0\u1ee3c m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 c\u00f3 t\u00ednh ch\u1ea5t n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?","select":["A. Song song","B. H\u1ed9i t\u1ee5","C. Ph\u00e2n k\u00ec","D. Kh\u00f4ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng"],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu m\u1ed9t ch\u00f9m tia t\u1edbi song song l\u00ean m\u1ed9t g\u01b0\u01a1ng c\u1ea7u l\u00f5m, ta thu \u0111\u01b0\u1ee3c m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 l\u00e0 ch\u00f9m h\u1ed9i t\u1ee5.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2172},{"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":"V\u00ec sao nh\u1edd c\u00f3 pha \u0111\u00e8n m\u00e0 \u0111\u00e8n pin l\u1ea1i c\u00f3 th\u1ec3 chi\u1ebfu s\u00e1ng \u0111\u01b0\u1ee3c xa h\u01a1n so v\u1edbi khi kh\u00f4ng c\u00f3 pha \u0111\u00e8n?","select":["A. V\u00ec pha \u0111\u00e8n ph\u1ea3n x\u1ea1 \u0111\u01b0\u1ee3c \u00e1nh s\u00e1ng","B. V\u00ec pha \u0111\u00e8n c\u00f3 th\u1ec3 h\u1ed9i t\u1ee5 \u00e1nh s\u00e1ng t\u1ea1i m\u1ed9t \u0111i\u1ec3m \u1edf xa","C. V\u00ec pha \u0111\u00e8n l\u00e0m cho \u00e1nh s\u00e1ng m\u1ea1nh th\u00eam","D. V\u00ec pha \u0111\u00e8n c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t ch\u00f9m ph\u1ea3n x\u1ea1 song song"],"hint":"","explain":"<span class='basic_left'>V\u00ec pha \u0111\u00e8n c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t ch\u00f9m ph\u1ea3n x\u1ea1 song song n\u00ean nh\u1edd c\u00f3 pha \u0111\u00e8n m\u00e0 \u0111\u00e8n pin l\u1ea1i c\u00f3 th\u1ec3 chi\u1ebfu s\u00e1ng \u0111\u01b0\u1ee3c xa h\u01a1n so v\u1edbi khi kh\u00f4ng c\u00f3 pha \u0111\u00e8n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2173},{"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\u00ec sao ng\u01b0\u1eddi l\u00e1i \u00f4 t\u00f4 hay xe m\u00e1y kh\u00f4ng d\u00f9ng g\u01b0\u01a1ng c\u1ea7u l\u00f5m \u0111\u1ec3 quan s\u00e1t \u1ea3nh \u1ea3o c\u1ee7a c\u00e1c v\u1eadt \u1edf ph\u00eda sau xe?","select":["A. V\u00ec \u1ea3nh kh\u00f4ng r\u00f5 n\u00e9t.","B. V\u00ec v\u1eadt ph\u1ea3i \u0111\u1ec3 r\u1ea5t g\u1ea7n g\u01b0\u01a1ng m\u1edbi cho \u1ea3nh \u1ea3o.","C. V\u00ec \u1ea3nh \u1ea3o nh\u1ecf h\u01a1n v\u1eadt nhi\u1ec1u l\u1ea7n.","D. V\u00ec \u1ea3nh \u1ea3o n\u1eb1m xa g\u01b0\u01a1ng \u1edf ph\u00eda sau m\u1eaft."],"hint":"","explain":"<span class='basic_left'>V\u00ec v\u1eadt ph\u1ea3i \u0111\u1ec3 r\u1ea5t g\u1ea7n g\u01b0\u01a1ng m\u1edbi cho \u1ea3nh \u1ea3o, n\u00ean \u0111i\u1ec1u n\u00e0y kh\u00f4ng gi\u00fap \u00edch \u0111\u01b0\u1ee3c g\u00ec khi \u0111i tr\u00ean \u0111\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2174},{"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":"\u0110\u1eb7t m\u1ed9t v\u1eadt l\u1ea7n l\u01b0\u1ee3t tr\u01b0\u1edbc ba g\u01b0\u01a1ng (g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng c\u1ea7u l\u00f5m, g\u01b0\u01a1ng ph\u1eb3ng). S\u1eafp x\u1ebfp ba lo\u1ea1i g\u01b0\u01a1ng \u0111\u1ec3 k\u00edch th\u01b0\u1edbc \u1ea3nh thu \u0111\u01b0\u1ee3c theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n.","select":["A. G\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u00f5m, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i","B. G\u01b0\u01a1ng c\u1ea7u l\u00f5m, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng ph\u1eb3ng","C. G\u01b0\u01a1ng c\u1ea7u l\u00f5m, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i.","D. G\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u00f5m."],"hint":"","explain":"<span class='basic_left'>Theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n l\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u00f5m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2175},{"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\u00ec sao nh\u1edd c\u00f3 g\u01b0\u01a1ng ph\u1ea3n x\u1ea1, \u0111\u00e8n pin l\u1ea1i c\u00f3 th\u1ec3 chi\u1ebfu \u00e1nh s\u00e1ng \u0111i xa? ","select":["A. V\u00ec g\u01b0\u01a1ng h\u1eaft \u00e1nh s\u00e1ng tr\u1edf l\u1ea1i","B. V\u00ec g\u01b0\u01a1ng cho \u1ea3nh \u1ea3o r\u00f5 h\u01a1n","C. V\u00ec \u0111\u00f3 l\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho ch\u00f9m ph\u1ea3n x\u1ea1 song song","D. V\u00ec nh\u1edd c\u00f3 g\u01b0\u01a1ng ta nh\u00ecn th\u1ea5y nh\u1eefng v\u1eadt \u1edf xa"],"hint":"","explain":"<span class='basic_left'>V\u00ec \u0111\u00f3 l\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho ch\u00f9m ph\u1ea3n x\u1ea1 song song, t\u1eadp trung n\u0103ng l\u01b0\u1ee3ng l\u1ea1i d\u1eabn \u0111\u1ebfn truy\u1ec1n \u0111i xa h\u01a1n ch\u00f9m ph\u00e2n k\u1ef3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2176},{"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":"M\u1eb7t ph\u1ea3n x\u1ea1 c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0:","select":["A. M\u1eb7t trong c\u1ee7a ch\u1ecfm c\u1ea7u","B. M\u1eb7t ngo\u00e0i c\u1ee7a ch\u1ecfm c\u1ea7u","C. M\u1eb7t ph\u1eb3ng nh\u01b0 g\u01b0\u01a1ng ph\u1eb3ng","D. A, B, C \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>M\u1eb7t ph\u1ea3n x\u1ea1 c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 m\u1eb7t trong c\u1ee7a ch\u1ecfm c\u1ea7u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2177},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"M\u1ed9t b\u1ea1n h\u1ecdc sinh \u0111\u00e3 \u0111\u1eb7t m\u1ed9t vi\u00ean bi tr\u01b0\u1edbc m\u1ed9t g\u01b0\u01a1ng c\u1ea7u l\u00f5m r\u1ea5t g\u1ea7n m\u1eb7t g\u01b0\u01a1ng v\u00e0 r\u00fat ra \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 k\u1ebft lu\u1eadn. Theo em k\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?","select":["A. \u1ea2nh c\u1ee7a vi\u00ean bi l\u00e0 \u1ea3nh \u1ea3o","B. \u1ea2nh c\u1ee7a vi\u00ean bi kh\u00f4ng h\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n ch\u1eafn","C. \u1ea2nh c\u1ee7a vi\u00ean bi l\u1edbn h\u01a1n vi\u00ean bi","D. \u1ea2nh c\u1ee7a vi\u00ean bi c\u00f3 th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1edf sau g\u01b0\u01a1ng"],"hint":"","explain":"<span class='basic_left'>\u1ea2nh c\u1ee7a vi\u00ean bi l\u00e0 \u1ea3nh \u1ea3o n\u00ean kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1edf sau g\u01b0\u01a1ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2178},{"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":"C\u00e1c lo\u1ea1i g\u01b0\u01a1ng n\u00e0o sau \u0111\u00e2y c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng khi c\u00f3 \u00e1nh s\u00e1ng truy\u1ec1n \u0111\u1ebfn n\u00f3?","select":["A. G\u01b0\u01a1ng ph\u1eb3ng","B. G\u01b0\u01a1ng c\u1ea7u l\u1ed3i","C. G\u01b0\u01a1ng c\u1ea7u l\u00f5m","D. C\u1ea3 ba lo\u1ea1i g\u01b0\u01a1ng tr\u00ean"],"hint":"","explain":"<span class='basic_left'>C\u1ea3 ba lo\u1ea1i g\u01b0\u01a1ng tr\u00ean \u0111\u1ec1u c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng khi c\u00f3 \u00e1nh s\u00e1ng truy\u1ec1n \u0111\u1ebfn n\u00f3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2179},{"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":"Em h\u00e3y ch\u1ecdn c\u00e2u \u0111\u00fang trong c\u00e1c c\u00e2u d\u01b0\u1edbi \u0111\u00e2y:","select":["A. G\u01b0\u01a1ng c\u1ea7u l\u00f5m lu\u00f4n lu\u00f4n cho \u1ea3nh \u1ea3o","B. G\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 th\u1ec3 cho \u1ea3nh th\u1eadt hay \u1ea3nh \u1ea3o. \u1ea2nh \u1ea3o c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u1edbn h\u01a1n v\u1eadt","C. V\u00ec c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho \u1ea3nh l\u1edbn h\u01a1n v\u1eadt nh\u01b0ng v\u1eabn nh\u1ecf h\u01a1n g\u01b0\u01a1ng c\u1ea7u l\u1ed3i","D. V\u00ec b\u1ec1 r\u1ed9ng v\u00f9ng nh\u00ecn th\u1ea5y c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u1ed3i l\u1edbn h\u01a1n g\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i lu\u00f4n cho \u1ea3nh \u1ea3o nh\u1ecf h\u01a1n v\u1eadt"],"hint":"","explain":"<span class='basic_left'>G\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 th\u1ec3 cho \u1ea3nh th\u1eadt hay \u1ea3nh \u1ea3o. \u1ea2nh \u1ea3o c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u1edbn h\u01a1n v\u1eadt.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2180},{"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":"Trong ba lo\u1ea1i g\u01b0\u01a1ng (g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u00f5m), g\u01b0\u01a1ng n\u00e0o cho \u1ea3nh \u1ea3o c\u1ee7a c\u00f9ng m\u1ed9t v\u1eadt l\u1edbn nh\u1ea5t ?","select":["A. g\u01b0\u01a1ng c\u1ea7u l\u00f5m","B. g\u01b0\u01a1ng c\u1ea7u l\u1ed3i","C. g\u01b0\u01a1ng c\u1ea7u l\u00f5m v\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i l\u00e0 nh\u01b0 nhau","D. g\u01b0\u01a1ng ph\u1eb3ng"],"hint":"","explain":"<span class='basic_left'> V\u1edbi c\u00f9ng m\u1ed9t v\u1eadt, g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho \u1ea3nh \u1ea3o l\u1edbn nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2181},{"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":"T\u1ea1i sao \u1edf c\u00e1c g\u00f3c \u0111\u01b0\u1eddng c\u00f3 kh\u00fac cua h\u1eb9p ng\u01b0\u1eddi ta l\u1ea1i l\u1eafp c\u00e1c lo\u1ea1i g\u01b0\u01a1ng c\u1ea7u l\u1ed3i m\u00e0 kh\u00f4ng d\u00f9ng c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u00f5m?","select":["A. V\u00ec c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u1ed3i cho \u1ea3nh r\u00f5 n\u00e9t h\u01a1n","B. V\u00ec c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u1ed3i lu\u00f4n lu\u00f4n cho \u1ea3nh \u1ea3o","C. V\u00ec c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho \u1ea3nh l\u1edbn h\u01a1n v\u1eadt nh\u01b0ng v\u1eabn nh\u1ecf h\u01a1n g\u01b0\u01a1ng c\u1ea7u l\u1ed3i","D. V\u00ec b\u1ec1 r\u1ed9ng c\u1ee7a v\u00f9ng nh\u00ecn th\u1ea5y c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u1ed3i l\u1edbn h\u01a1n g\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i lu\u00f4n cho \u1ea3nh \u1ea3o nh\u1ecf h\u01a1n v\u1eadt"],"hint":"","explain":"<span class='basic_left'>V\u00ec b\u1ec1 r\u1ed9ng c\u1ee7a v\u00f9ng nh\u00ecn th\u1ea5y c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u1ed3i l\u1edbn h\u01a1n g\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i lu\u00f4n cho \u1ea3nh \u1ea3o nh\u1ecf h\u01a1n v\u1eadt n\u00ean \u1edf c\u00e1c g\u00f3c \u0111\u01b0\u1eddng c\u00f3 kh\u00fac cua h\u1eb9p ng\u01b0\u1eddi ta l\u1ea1i l\u1eafp c\u00e1c lo\u1ea1i g\u01b0\u01a1ng c\u1ea7u l\u1ed3i m\u00e0 kh\u00f4ng d\u00f9ng c\u00e1c g\u01b0\u01a1ng c\u1ea7u l\u00f5m, \u0111\u1ec3 gi\u00fap m\u1edf r\u1ed9ng t\u1ea7m nh\u00ecn c\u1ee7a l\u00e1i xe.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2182},{"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":"H\u00e3y ch\u1ecdn c\u00e2u \u0111\u00fang trong c\u00e1c c\u00e2u d\u01b0\u1edbi \u0111\u00e2y:","select":["A. G\u01b0\u01a1ng c\u1ea7u l\u00f5m cho \u1ea3nh nh\u1ecf h\u01a1n v\u1eadt tuy nhi\u00ean c\u00e0ng \u0111\u01b0a v\u1eadt ra xa th\u00ec k\u00edch th\u01b0\u1edbc c\u1ee7a \u1ea3nh c\u00e0ng t\u0103ng","B. G\u01b0\u01a1ng c\u1ea7u l\u00f5m cho \u1ea3nh l\u1edbn h\u01a1n v\u1eadt tuy nhi\u00ean c\u00e0ng \u0111\u01b0a v\u1eadt ra xa k\u00edch th\u01b0\u1edbc c\u1ee7a \u1ea3nh c\u00e0ng nh\u1ecf","C. N\u1ebfu d\u1ecbch v\u1eadt ra xa g\u01b0\u01a1ng c\u1ea7u l\u00f5m, c\u00e1ch g\u01b0\u01a1ng m\u1ed9t kho\u1ea3ng l\u1edbn h\u01a1n b\u00e1n k\u00ednh c\u1ee7a g\u01b0\u01a1ng th\u00ec g\u01b0\u01a1ng c\u1ea7u l\u00f5m s\u1ebd cho \u1ea3nh th\u1eadt nh\u1ecf h\u01a1n v\u1eadt v\u00e0 ng\u01b0\u1ee3c chi\u1ec1u","D. \u1ea2nh qua g\u01b0\u01a1ng c\u1ea7u l\u00f5m bao gi\u1edd c\u0169ng l\u00e0 \u1ea3nh \u1ea3o"],"hint":"","explain":"<span class='basic_left'>N\u1ebfu d\u1ecbch v\u1eadt ra xa g\u01b0\u01a1ng c\u1ea7u l\u00f5m, c\u00e1ch g\u01b0\u01a1ng m\u1ed9t kho\u1ea3ng l\u1edbn h\u01a1n b\u00e1n k\u00ednh c\u1ee7a g\u01b0\u01a1ng th\u00ec g\u01b0\u01a1ng c\u1ea7u l\u00f5m s\u1ebd cho \u1ea3nh th\u1eadt nh\u1ecf h\u01a1n v\u1eadt v\u00e0 ng\u01b0\u1ee3c chi\u1ec1u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2183},{"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\u00ec sao nh\u1edd c\u00f3 g\u01b0\u01a1ng ph\u1ea3n x\u1ea1, \u0111\u00e8n pin l\u1ea1i c\u00f3 th\u1ec3 chi\u1ebfu \u00e1nh s\u00e1ng \u0111i xa? ","select":["A. V\u00ec g\u01b0\u01a1ng h\u1eaft \u00e1nh s\u00e1ng tr\u1edf l\u1ea1i","B. V\u00ec g\u01b0\u01a1ng cho \u1ea3nh \u1ea3o r\u00f5 h\u01a1n","C. V\u00ec \u0111\u00f3 l\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho ch\u00f9m ph\u1ea3n x\u1ea1 song song","D. V\u00ec nh\u1edd c\u00f3 g\u01b0\u01a1ng ta nh\u00ecn th\u1ea5y nh\u1eefng v\u1eadt \u1edf xa"],"hint":"","explain":"<span class='basic_left'>V\u00ec \u0111\u00f3 l\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u00f5m cho ch\u00f9m ph\u1ea3n x\u1ea1 song song, t\u1eadp trung n\u0103ng l\u01b0\u1ee3ng l\u1ea1i d\u1eabn \u0111\u1ebfn truy\u1ec1n \u0111i xa h\u01a1n ch\u00f9m ph\u00e2n k\u1ef3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2184},{"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 ch\u00f9m tia t\u1edbi ph\u00e2n k\u00ec \u0111\u1ebfn g\u01b0\u01a1ng c\u1ea7u l\u00f5m ta c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c nh\u1eefng ch\u00f9m s\u00e1ng ph\u1ea3n x\u1ea1 n\u00e0o sau \u0111\u00e2y?","select":["A. Ch\u00f9m s\u00e1ng ph\u00e2n k\u00ec","B. Ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5","C. Ch\u00f9m s\u00e1ng song song","D. C\u1ea3 ba c\u00e2u tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>Khi \u0111i\u1ec3m xu\u1ea5t ph\u00e1t (S) c\u1ee7a ch\u00f9m ph\u00e2n k\u00ec c\u00e1ch \u0111\u1ec9nh c\u1ee7a g\u01b0\u01a1ng (O) m\u1ed9t kho\u1ea3ng nh\u1ecf h\u01a1n m\u1ed9t n\u1eeda b\u00e1n k\u00ednh c\u1ee7a g\u01b0\u01a1ng (t\u1ee9c l\u00e0 thu\u1ed9c kho\u1ea3ng OF) th\u00ec ch\u00f9m s\u00e1ng ph\u1ea3n x\u1ea1 l\u00e0 ch\u00f9m ph\u00e2n k\u00ec.<br\/>N\u1ebfu S n\u1eb1m c\u00e1ch \u0111\u1ec9nh m\u1ed9t kho\u1ea3ng b\u1eb1ng m\u1ed9t n\u1eeda b\u00e1n k\u00ednh (n\u1eb1m \u1edf F) th\u00ec ch\u00f9m s\u00e1ng ph\u1ea3n x\u1ea1 l\u00e0 ch\u00f9m song song.<br\/>N\u1ebfu S n\u1eb1m c\u00e1ch \u0111\u1ec9nh O m\u1ed9 kho\u1ea3ng l\u1edbn h\u01a1n m\u1ed9t n\u1eeda b\u00e1n k\u00ednh c\u1ee7a g\u01b0\u01a1ng (ngo\u00e0i kho\u1ea3ng OC) th\u00ec ch\u00f9m s\u00e1ng ph\u1ea3n x\u1ea1 l\u00e0 ch\u00f9m h\u1ed9i t\u1ee5.<br\/>V\u1eady c\u1ea3 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":2}]}],"id_ques":2185},{"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":"\u0110\u1ed3 d\u00f9ng kh\u00f4ng c\u00f3 t\u00e1c d\u1ee5ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t g\u01b0\u01a1ng c\u1ea7u l\u00f5m?","select":["A. M\u1eb7t l\u00f5m c\u1ee7a th\u00eca","B. Vung n\u1ed3i","C. M\u1eb7t l\u00f5m c\u1ee7a ch\u1ea3o nh\u00f4m b\u00f3ng","D. M\u1eb7t ngo\u00e0i c\u1ee7a n\u1eafp c\u1ed1c b\u00f3ng"],"hint":"","explain":"<span class='basic_left'>M\u1eb7t ngo\u00e0i c\u1ee7a n\u1eafp c\u1ed1c b\u00f3ng c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2186},{"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":"Mu\u1ed1n thu \u0111\u01b0\u1ee3c ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5 t\u1eeb \u0111\u00e8n ra th\u00ec ph\u1ea3i xoay pha \u0111\u00e8n \u0111\u1ec3 cho b\u00f3ng \u0111\u00e8n nh\u01b0 th\u1ebf n\u00e0o?","select":["A. Ra xa g\u01b0\u01a1ng","B. L\u1ea1i g\u1ea7n g\u01b0\u01a1ng","C. Sang b\u00ean ph\u1ea3i c\u1ee7a g\u01b0\u01a1ng","D. Sang b\u00ean tr\u00e1i c\u1ee7a g\u01b0\u01a1ng"],"hint":"","explain":"<span class='basic_left'>Mu\u1ed1n thu \u0111\u01b0\u1ee3c ch\u00f9m s\u00e1ng h\u1ed9i t\u1ee5 t\u1eeb \u0111\u00e8n pin ph\u00e1t ra th\u00ec ta ph\u1ea3i xoay pha \u0111\u00e8n \u0111\u1ec3 cho b\u00f3ng \u0111\u00e8n ra xa g\u01b0\u01a1ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2187},{"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\u00e0o \u00f4 tr\u1ed1ng.<br\/>G\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 t\u00e1c d\u1ee5ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m (1) .... th\u00e0nh m\u1ed9t ch\u00f9m (2).......v\u00e0o m\u1ed9t \u0111i\u1ec3m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m (3).........th\u00edch h\u1ee3p th\u00e0nh m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 song song.","select":["A. (1) - tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5; ( 2) - tia t\u1edbi ph\u00e2n k\u00ec; (3) - tia t\u1edbi song song","B. (1) - tia t\u1edbi song song; (2) - tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5; (3) - tia t\u1edbi ph\u00e2n k\u00ec","C. (1) - tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5 ; (2) - tia t\u1edbi song song; (3) - tia t\u1edbi ph\u00e2n k\u00ec","D. (1) - tia t\u1edbi song song ; (2) - tia t\u1edbi ph\u00e2n k\u00ec ; (3) - tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5"],"hint":"","explain":"<span class='basic_left'>G\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 t\u00e1c d\u1ee5ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m (1) tia t\u1edbi song song th\u00e0nh m\u1ed9t ch\u00f9m (2) tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5 v\u00e0o m\u1ed9t \u0111i\u1ec3m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m (3) tia t\u1edbi ph\u00e2n k\u00ec th\u00edch h\u1ee3p th\u00e0nh m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 song song.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2188},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Nh\u1eadn x\u00e9t n\u00e0o sau \u0111\u00e2y v\u1ec1 \u1ea3nh c\u1ee7a c\u00e2y n\u1ebfn t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 sai.","select":["A. \u1ea2nh \u1ea3o","B. H\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n","C. Kh\u00f4ng h\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n","D. L\u1edbn h\u01a1n c\u00e2y n\u1ebfn"],"hint":"","explain":"<span class='basic_left'>\u1ea2nh c\u1ee7a c\u00e2y n\u1ebfn t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2189},{"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":"V\u1edbi c\u00f9ng m\u1ed9t v\u1eadt, nh\u1eadn x\u00e9t n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang:","select":["A. \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m.","B. \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m< \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng","C. \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m< \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i","D. \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m< \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng"],"hint":"","explain":"<span class='basic_left'>\u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng < \u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2190}],"lesson":{"save":0,"level":2}}