{"common":{"save":0,"post_id":"6338","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9963","post_id":"6338","mon_id":"1158739","chapter_id":"1158831","question":"<p>Khi nào ta có th\u1ec3 nhìn th\u1ea5y \u1ea3nh S’ c\u1ee7a m\u1ed9t \u0111i\u1ec3m sáng S \u0111\u1eb7t tr\u01b0\u1edbc g\u01b0\u01a1ng ph\u1eb3ng?<\/p>","options":["A. Khi \u1ea3nh S’ \u1edf phía tr\u01b0\u1edbc m\u1eaft ta.","B. Khi S’ là ngu\u1ed3n sáng.","C. Khi gi\u1eefa m\u1eaft và \u1ea3nh S’ không có v\u1eadt ch\u1eafn sáng.","D. Khi m\u1eaft nh\u1eadn \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 c\u1ee7a các tia t\u1edbi xu\u1ea5t phát t\u1eeb \u0111i\u1ec3m sáng S. "],"correct":"4","level":"2","hint":"","answer":"<p>\u0110\u1ec3 nhìn \u0111\u01b0\u1ee3c v\u1eadt thì tia sáng t\u1eeb v\u1eadt phát ra ph\u1ea3i \u0111i \u0111\u1ebfn m\u1eaft ng\u01b0\u1eddi.<br \/>\u0110\u1ec3 nhìn \u0111\u01b0\u1ee3c \u1ea3nh c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng, m\u1eaft ph\u1ea3i nh\u1eadn \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 c\u1ee7a các tia t\u1edbi xu\u1ea5t phát t\u1eeb \u0111i\u1ec3m sáng S.<br \/><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng: D. Khi m\u1eaft nh\u1eadn \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 c\u1ee7a các tia t\u1edbi xu\u1ea5t phát t\u1eeb \u0111i\u1ec3m sáng S.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-24 14:38:35","option_type":"txt","len":3},{"id":"9964","post_id":"6338","mon_id":"1158739","chapter_id":"1158831","question":"<p>\u0110\u1eb7t m\u1ed9t cu\u1ed1n sách cách g\u01b0\u01a1ng ph\u1eb3ng m\u1ed9t kho\u1ea3ng 20 cm thì kho\u1ea3ng cách t\u1eeb \u1ea3nh c\u1ee7a cu\u1ed1n sách t\u1edbi g\u01b0\u01a1ng b\u1eb1ng bao nhiêu?<\/p>","options":["A. 0,2 m.","B. 2 m.","C. 4 m.","D. 0,4 m."],"correct":"1","level":"2","hint":"<p>\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng có tính ch\u1ea5t: Kho\u1ea3ng cách t\u1eeb \u1ea3nh \u0111\u1ebfn g\u01b0\u01a1ng b\u1eb1ng kho\u1ea3ng cách t\u1eeb v\u1eadt \u0111\u1ebfn g\u01b0\u01a1ng.<\/p>","answer":"<p>Kho\u1ea3ng cách t\u1eeb \u1ea3nh c\u1ee7a cu\u1ed1n sách t\u1edbi g\u01b0\u01a1ng b\u1eb1ng kho\u1ea3ng cách t\u1eeb cu\u1ed1n sách t\u1edbi g\u01b0\u01a1ng = 20 cm = 0,2 m.<br \/><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng: A. 0,2 m.<\/strong><\/span><br \/> <\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-24 14:41:59","option_type":"txt","len":0},{"id":"9965","post_id":"6338","mon_id":"1158739","chapter_id":"1158831","question":"<p>Có m\u1ea5y cách d\u1ef1ng \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt qua g\u01b0\u01a1ng ph\u1eb3ng?<\/p>","options":["A. 5. ","B. 3. ","C. 4. ","D. 2."],"correct":"4","level":"2","hint":"<p>Các cách d\u1ef1ng \u1ea3nh c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng ph\u1eb3ng:<br \/>- D\u1ef1a vào \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 ánh sáng.<br \/>- D\u1ef1a vào tính ch\u1ea5t \u1ea3nh.<\/p>","answer":"<p>Có 2 cách d\u1ef1ng \u1ea3nh c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng ph\u1eb3ng.<br \/><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng: D. 2.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-24 14:43:09","option_type":"txt","len":0}]}
