{"segment":[{"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":"L\u0103ng k\u00ednh v\u00e0 m\u1eb7t ghi c\u1ee7a \u0111\u0129a CD \u0111\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng ","select":["A. kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng.","B. nhu\u1ed9m m\u00e0u \u00e1nh s\u00e1ng.","C. t\u1ed5ng h\u1ee3p \u00e1nh s\u00e1ng.","D. ph\u00e2n t\u00edch \u00e1nh s\u00e1ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3631},{"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":"Th\u00ed nghi\u1ec7m n\u00e0o sau \u0111\u00e2y l\u00e0 th\u00ed nghi\u1ec7m ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng? ","select":["A. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng tr\u1eafng qua m\u1ed9t l\u0103ng k\u00ednh.","B. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng tr\u1eafng v\u00e0o m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng.","C. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng tr\u1eafng v\u00e0o k\u00ednh l\u00fap.","D. Chi\u1ebfu ch\u00f9m s\u00e1ng tr\u1eafng qua m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3632},{"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":"Khi chi\u1ebfu \u00e1nh s\u00e1ng tr\u1eafng v\u00e0o m\u1eb7t ghi c\u1ee7a \u0111\u0129a CD. \u00c1nh s\u00e1ng t\u1eeb \u0111\u0129a CD \u0111\u1ebfn m\u1eaft ta c\u00f3 nh\u1eefng m\u00e0u n\u00e0o? ","select":["A. M\u00e0u \u0111\u1ecf v\u00e0 m\u00e0u xanh.","B. M\u00e0u v\u00e0ng v\u00e0 m\u00e0u \u0111\u1ecf.","C. M\u00e0u xanh, m\u00e0u h\u1ed3ng v\u00e0 m\u00e0u t\u00edm.","D. Tu\u1ef3 theo ph\u01b0\u01a1ng nh\u00ecn ta c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c m\u00e0u s\u1eafc kh\u00e1c nhau."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3633},{"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 tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y, ch\u00f9m s\u00e1ng tr\u1eafng kh\u00f4ng b\u1ecb ph\u00e2n t\u00edch th\u00e0nh c\u00e1c ch\u00f9m s\u00e1ng c\u00f3 m\u00e0u kh\u00e1c nhau? ","select":["A. Cho ch\u00f9m s\u00e1ng tr\u1eafng \u0111i qua m\u1ed9t l\u0103ng k\u00ednh.","B. Cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng.","C. Cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean m\u1eb7t ghi c\u1ee7a m\u1ed9t \u0111\u0129a CD.","D. Cho ch\u00f9m s\u00e1ng tr\u1eafng chi\u1ebfu v\u00e0o c\u00e1c v\u00e1ng d\u1ea7u, m\u1ee1 hay bong b\u00f3ng x\u00e0 ph\u00f2ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3634},{"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":"Ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng b\u1eb1ng c\u00e1ch ","select":["A. cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean m\u1eb7t ghi c\u1ee7a \u0111\u0129a CD.","B. cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a g\u01b0\u01a1ng ph\u1eb3ng.","C. cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a g\u01b0\u01a1ng c\u1ea7u.","D. cho ch\u00f9m s\u00e1ng tr\u1eafng ph\u1ea3n x\u1ea1 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a th\u1ea5u k\u00ednh."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3635},{"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":"Quan s\u00e1t ph\u00eda sau c\u1ee7a l\u0103ng k\u00ednh, ta th\u1ea5y ch\u00f9m tia l\u00f3 \u0111i qua l\u0103ng k\u00ednh ch\u1ec9 c\u00f3 m\u00e0u \u0111\u1ecf. V\u1eady ch\u00f9m tia t\u1edbi l\u0103ng k\u00ednh c\u00f3 m\u00e0u ","select":["A. v\u00e0ng.","B. xanh.","C. \u0111\u1ecf.","D. cam."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3636},{"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 tia t\u1edbi l\u0103ng k\u00ednh c\u00f3 m\u00e0u xanh. Quan s\u00e1t ph\u00eda sau l\u0103ng k\u00ednh ta th\u1ea5y ch\u00f9m tia l\u00f3 \u0111i qua l\u0103ng k\u00ednh c\u00f3 m\u00e0u ","select":["A. v\u00e0ng.","B. xanh.","C. \u0111\u1ecf.","D. cam."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3637},{"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":"\u00c1nh s\u00e1ng tr\u1eafng \u0111\u01b0\u1ee3c h\u1ee3p b\u1edfi ","select":["A. hai \u00e1nh s\u00e1ng m\u00e0u \u0111\u01a1n s\u1eafc.","B. m\u1ed9t \u00e1nh s\u00e1ng m\u00e0u \u0111\u01a1n s\u1eafc.","C. b\u1ea3y \u00e1nh s\u00e1ng m\u00e0u \u0111\u01a1n s\u1eafc t\u1eeb \u0111\u1ecf \u0111\u1ebfn t\u00edm.","D. v\u00f4 s\u1ed1 \u00e1nh s\u00e1ng m\u00e0u kh\u00f4ng \u0111\u01a1n s\u1eafc."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3638},{"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":"K\u1ebft lu\u1eadn n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u00fang? ","select":["A. Chi\u1ebfu tia s\u00e1ng \u0111\u01a1n s\u1eafc \u0111\u1ecf qua m\u1ed9t l\u0103ng k\u00ednh ta c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tia s\u00e1ng xanh.","B. Chi\u1ebfu tia s\u00e1ng \u0111\u01a1n s\u1eafc \u0111\u1ecf qua m\u1ed9t l\u0103ng k\u00ednh ta c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tia s\u00e1ng tr\u1eafng.","C. Chi\u1ebfu tia s\u00e1ng tr\u1eafng qua m\u1ed9t l\u0103ng k\u00ednh ta c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tia s\u00e1ng xanh.","D. Chi\u1ebfu tia s\u00e1ng tr\u1eafng qua m\u1ed9t l\u0103ng k\u00ednh ta c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tia s\u00e1ng tr\u1eafng. "],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3639},{"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":"Khi ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng b\u1eb1ng l\u0103ng k\u00ednh ta nh\u1eadn \u0111\u01b0\u1ee3c d\u1ea3i m\u00e0u g\u1ed3m 7 m\u00e0u ch\u00ednh g\u00f4\u0300m ","select":["A. \u0110\u1ecf, h\u1ed3ng, da cam, v\u00e0ng, l\u1ee5c, lam, t\u00edm.","B. \u0110\u1ecf, h\u1ed3ng, da cam, v\u00e0ng, l\u1ee5c, n\u00e2u, t\u00edm.","C. \u0110\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, n\u00e2u, t\u00edm.","D. \u0110\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3640},{"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":"Ng\u01b0\u1eddi ta n\u00f3i th\u00ed nghi\u1ec7m quan s\u00e1t \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 tr\u00ean \u0111\u0129a CD c\u0169ng l\u00e0 th\u00ed nghi\u1ec7m ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng v\u00ec sau khi ph\u1ea3n x\u1ea1, ch\u00f9m s\u00e1ng tr\u1eafng \u0111\u00e3 b\u1ecb ","select":["A. t\u00e1ch th\u00e0nh nhi\u1ec1u d\u1ea3i \u00e1nh s\u00e1ng c\u00f3 m\u00e0u kh\u00e1c nhau.","B. m\u1ea5t \u0111i.","C. thay b\u1eb1ng ch\u00f9m s\u00e1ng xanh v\u00e0 t\u00edm.","D. thay b\u1eb1ng ch\u00f9m s\u00e1ng \u0111\u1ecf v\u00e0 v\u00e0ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3641},{"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 ch\u00f9m s\u00e1ng v\u00e0o l\u0103ng k\u00ednh, \u00e1nh s\u00e1ng l\u00f3 ra c\u0169ng ch\u1ec9 c\u00f3 m\u1ed9t m\u00e0u duy nh\u1ea5t. Ch\u00f9m s\u00e1ng chi\u1ebfu v\u00e0o l\u0103ng k\u00ednh l\u00e0 ","select":["A. \u00e1nh s\u00e1ng tr\u1eafng. ","B. \u00e1nh s\u00e1ng kh\u00f4ng \u0111\u01a1n s\u1eafc.","C. \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc.","D. \u00e1nh s\u00e1ng c\u1ea3 xanh v\u00e0 \u0111\u1ecf."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3642},{"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":"Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o sau \u0111\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng? ","select":["A. \u00c1nh s\u00e1ng qua t\u1ea5m l\u1ecdc m\u00e0u.","B. Hi\u1ec7n t\u01b0\u1ee3ng c\u1ea7u v\u1ed3ng.","C. Hi\u1ec7n t\u01b0\u1ee3ng kh\u00fac x\u1ea1.","D. \u00c1nh s\u00e1ng ph\u00e1t ra t\u1eeb \u0111\u00e8n LED \u0111\u1ecf."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3643},{"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 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0o \u0111\u0129a CD, ta nghi\u00eang \u0111\u0129a c\u00e1c g\u00f3c kh\u00e1c nhau s\u1ebd thu \u0111\u01b0\u1ee3c c\u00e1c \u00e1nh s\u00e1ng m\u00e0u kh\u00e1c nhau v\u00ec ","select":["A. \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c m\u00e0u \u0111\u00f3.","B. \u0111\u0129a CD ch\u1ee9a c\u00e1c m\u00e0u \u0111\u00f3.","C. \u0111\u0129a CD c\u00f3 t\u00e1c d\u1ee5ng bi\u1ebfn \u00e1nh s\u00e1ng tr\u1eafng th\u00e0nh \u00e1nh s\u00e1ng m\u00e0u.","D. v\u1eadt li\u1ec7u l\u00e0m \u0111\u0129a CD \u0111\u00e3 nhu\u1ed9m m\u00e0u c\u00e1c \u00e1nh s\u00e1ng \u0111\u00f3."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3644},{"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":"\u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 \u00e1nh s\u00e1ng tr\u1eafng. K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang? ","select":["A. \u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 do c\u00e1c tia s\u00e1ng m\u00e0u tr\u1eafng h\u1ee3p th\u00e0nh.","B. \u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 do c\u00e1c tia s\u00e1ng m\u00e0u \u0111\u1ecf, l\u1ee5c, lam t\u1ea1o th\u00e0nh.","C. \u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 do c\u00e1c tia s\u00e1ng m\u00e0u \u0111\u1ecf c\u00e1nh sen, v\u00e0ng, lam h\u1ee3p th\u00e0nh.","D. \u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 do c\u00e1c tia s\u00e1ng m\u00e0u \u0111\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm h\u1ee3p th\u00e0nh."],"hint":"","explain":"<span class='basic_left'>\u00c1nh s\u00e1ng m\u1eb7t tr\u1eddi l\u00e0 \u00e1nh s\u00e1ng tr\u1eafng: v\u00ec khi chi\u1ebft su\u1ea5t \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi b\u1eb1ng l\u0103ng k\u00ednh trong su\u1ed1t ta nh\u1eadn \u0111\u01b0\u1ee3c d\u1ea3i m\u00e0u \u0111\u1ecf, da cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m, t\u00edm.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3645},{"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 tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u00e1nh s\u00e1ng tr\u1eafng s\u1ebd kh\u00f4ng b\u1ecb ph\u00e2n t\u00edch? ","select":["A. Chi\u1ebfu tia s\u00e1ng tr\u1eafng qua m\u1ed9t l\u0103ng k\u00ednh.","B. Chi\u1ebfu tia s\u00e1ng tr\u1eafng nghi\u00eang g\u00f3c v\u00e0o m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng.","C. Chi\u1ebfu tia s\u00e1ng tr\u1eafng nghi\u00eang g\u00f3c v\u00e0o m\u1eb7t ghi c\u1ee7a m\u1ed9t \u0111\u0129a CD.","D. Chi\u1ebfu ch\u00f9m s\u00e1ng tr\u1eafng v\u00e0o m\u1ed9t bong b\u00f3ng x\u00e0 ph\u00f2ng."],"hint":"","explain":"<span class='basic_left'>Trong tr\u01b0\u1eddng h\u1ee3p Chi\u1ebfu tia s\u00e1ng tr\u1eafng nghi\u00eang g\u00f3c v\u00e0o m\u1ed9t g\u01b0\u01a1ng ph\u1eb3ng th\u00ec \u00e1nh s\u00e1ng tr\u1eafng s\u1ebd kh\u00f4ng b\u1ecb ph\u00e2n t\u00edch.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3646},{"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/lop9/vatly/bai53/lv2/img\/17.jpg'\/><\/center>H\u00e3y l\u00e0m th\u00ed nghi\u1ec7m sau \u0111\u1ec3 c\u00f3 th\u1ec3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi c\u1ee7a b\u00e0i. Chi\u1ebfu \u00e1nh s\u00e1ng ph\u00e1t ra t\u1eeb m\u1ed9t \u0111\u00e8n LED l\u1ee5c v\u00e0o m\u1eb7t ghi c\u1ee7a m\u1ed9t \u0111\u0129a CD r\u1ed3i quan s\u00e1t \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 t\u1eeb m\u1eb7t \u0111\u0129a theo \u0111\u1ee7 m\u1ecdi ph\u00eda (h\u00ecnh 53-54.1). Ta s\u1ebd th\u1ea5y nh\u1eefng \u00e1nh s\u00e1ng m\u00e0u g\u00ec? ","select":["A. Ch\u1ec9 th\u1ea5y \u00e1nh s\u00e1ng m\u00e0u l\u1ee5c.","B. Th\u1ea5y c\u00e1c \u00e1nh s\u00e1ng c\u00f3 \u0111\u1ee7 m\u1ecdi m\u00e0u.","C. Kh\u00f4ng th\u1ea5y c\u00f3 \u00e1nh s\u00e1ng.","D. C\u00e1c c\u00e2u A, B, C \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu \u00e1nh s\u00e1ng ph\u00e1t ra t\u1eeb m\u1ed9t \u0111\u00e8n LED l\u1ee5c v\u00e0o m\u1eb7t ghi c\u1ee7a m\u1ed9t \u0111\u0129a CD r\u1ed3i quan s\u00e1t \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 t\u1eeb m\u1eb7t \u0111\u0129a theo \u0111\u1ee7 m\u1ecdi ph\u00eda (h\u00ecnh tr\u00ean). Ta s\u1ebd th\u1ea5y nh\u1eefng \u00e1nh s\u00e1ng m\u00e0u l\u1ee5c<br\/>V\u00ec 1 v\u1eadt mang m\u00e0u l\u1ee5c th\u00ec khi \u00e1nh s\u00e1ng tr\u1eafng chi\u1ebfu v\u00e0o v\u1eadt kh\u00f4ng h\u1ea5p th\u1ee5 m\u00e0u l\u1ee5c (c\u00f3 trong \u00e1nh s\u00e1ng tr\u1eafng) n\u00ean \u00e1nh s\u00e1ng tr\u1eafng truy\u1ec1n \u0111\u1ebfn m\u1eaft ta, ta th\u1ea5y v\u1eadt m\u00e0u l\u1ee5c<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3647},{"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/lop9/vatly/bai53/lv2/img\/17.jpg'\/><\/center>C\u00f9ng l\u00e0m th\u00ed nghi\u1ec7m tr\u00ean v\u1edbi \u0111\u00e8n LED \u0111\u1ecf, r\u1ed3i ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. ","select":["A. Ch\u1ec9 th\u1ea5y \u00e1nh s\u00e1ng m\u00e0u \u0111\u1ecf.","B. Th\u1ea5y c\u00e1c \u00e1nh s\u00e1ng c\u00f3 \u0111\u1ee7 m\u1ecdi m\u00e0u.","C. Kh\u00f4ng th\u1ea5y c\u00f3 \u00e1nh s\u00e1ng.","D. C\u00e1c c\u00e2u A, B, C \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu \u00e1nh s\u00e1ng ph\u00e1t ra t\u1eeb m\u1ed9t \u0111\u00e8n LED \u0111\u1ecf v\u00e0o m\u1eb7t ghi c\u1ee7a m\u1ed9t \u0111\u0129a CD r\u1ed3i quan s\u00e1t \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 t\u1eeb m\u1eb7t \u0111\u0129a theo \u0111\u1ee7 m\u1ecdi ph\u00eda (h\u00ecnh tr\u00ean). Ta s\u1ebd th\u1ea5y nh\u1eefng \u00e1nh s\u00e1ng m\u00e0u \u0111\u1ecf. V\u00ec 1 v\u1eadt mang m\u00e0u \u0111\u1ecf th\u00ec khi \u00e1nh s\u00e1ng tr\u1eafng chi\u1ebfu v\u00e0o v\u1eadt kh\u00f4ng h\u1ea5p th\u1ee5 m\u00e0u \u0111\u1ecf (c\u00f3 trong \u00e1nh s\u00e1ng tr\u1eafng) n\u00ean \u00e1nh s\u00e1ng tr\u1eafng truy\u1ec1n \u0111\u1ebfn m\u1eaft ta, ta th\u1ea5y v\u1eadt m\u00e0u \u0111\u1ecf<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3648},{"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":"Tr\u00ean \u0111\u01b0\u1eddng \u0111i c\u1ee7a ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng chi\u1ebfu v\u00e0o m\u1eb7t ghi c\u1ee7a \u0111\u0129a CD ta \u0111\u1ec3 m\u1ed9t t\u1ea5m l\u1ecdc m\u00e0u v\u00e0ng th\u00ec \u00e1nh s\u00e1ng t\u1eeb \u0111\u0129a CD \u0111\u1ebfn m\u1eaft ta c\u00f3 m\u00e0u ","select":["A. v\u00e0ng.","B. xanh.","C. \u0111\u1ecf.","D. cam."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3649},{"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":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang khi n\u00f3i v\u1ec1 t\u00e1c d\u1ee5ng c\u1ee7a l\u0103ng k\u00ednh khi chi\u1ebfu ch\u00f9m s\u00e1ng tr\u1eafng v\u00e0o n\u00f3? ","select":["A. L\u0103ng k\u00ednh \u0111\u00e3 nhu\u1ed9m c\u00e1c m\u00e0u s\u1eafc kh\u00e1c nhau cho \u00e1nh s\u00e1ng tr\u1eafng.","B. L\u0103ng k\u00ednh c\u00f3 t\u00e1c d\u1ee5ng t\u00e1ch c\u00e1c ch\u00f9m s\u00e1ng m\u00e0u c\u00f3 s\u1eb5n trong ch\u00f9m s\u00e1ng tr\u1eafng.","C. L\u0103ng k\u00ednh c\u00f3 t\u00e1c d\u1ee5ng h\u1ea5p th\u1ee5 c\u00e1c \u00e1nh s\u00e1ng m\u00e0u.","D. L\u0103ng k\u00ednh \u0111\u00e3 \u0111\u1ed5i m\u00e0u c\u1ee7a \u00e1nh s\u00e1ng tr\u1eafng."],"hint":"","explain":"<span class='basic_left'> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3650}],"lesson":{"save":0,"level":2}}