user-avatar
thanhchip10
2 năm trước
Chiếu 1 tia sáng SI cho phương nằm ngang lên 1 gương phẳng như hình vẽ, ta thu đc tia phản xạ theo phương thẳng đứng. Góc SIM tạo bởi tia tới SI và mặt gương có giá trị bao nhiêu?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Part 1. Use an expression above, over, under, below, or beneath to complete each sentence. 1. He’s too young to be allowed in this bar. He’s ………………… 2. Nobody would ever suspect her. She’s ………………… 3. There’ll be no trouble about repairing the television if it goes wrong. It’s ……………… 4. Don’t let those children get too wild! Keep them………………… 5. He’s taller than most people. He’s of………………… 6. The main thing is, don’t hurt him. …………………, keep him safe. 7. That’s rather unfair. You’re hitting………………… 8. I’m afraid I can’t work for anyone else. You see, I’m …………to my present employers for two years. 9. He whispered the answer. ‘Yes,’ he said,………………… 10. Someone who robs an old lady of all her savings is ………………, and deserves to be punished. 11. Use one of the………………… prepositions to complete these sentences. 12. It’s very frosty this morning. The temperature must have dropped……………… 13. Shall we discuss the problem after lunch,…………………? 14. He’s a freelance film director and travels all………………… making his films. 15. The village is well…………………, and at risk of being flooded if the sea wall is breached by a particularly high tide. 16. Doctors think heart attacks are sometimes brought on by being …………………at home or at work. 17. You’ll have to tell me the truth. Stop trying to pull the wool ………………… 18. If you don’t bargain with the market traders, you’ll be paying ………………..for their goods.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team