Chiếu một tia tới hợp với gương phẳng 1 góc `130 ^0` (gương phẳng đặt nằm ngang). Vẽ tia phản xạ `IR` và nêu cách vẽ. Tính góc tới và góc phản xạ.

Các câu hỏi liên quan

IX. Rewrite the following sentences. 1. Jane cooks better than her sister -> Jane's sister ............................................................................................................. 2. Tom is the best football player in this team -> Nobody in this team ............................................................................................... 3. Nothing is faster than the speed of light -> The speed of light ................................................................................................... 4. Jack is younger than he looks -> Jack isn't ................................................................................................................. 5. I didn't spend as much money as you -> You ......................................................................................................................... 6. Quang is lazier than Ha. (hard-working) ........................................................................................................................................................ 7. A city is noisier than a village. (peaceful) ........................................................................................................................................................ 8. There’s a post office on on side of my house and a café on the other. (between) ........................................................................................................................................................ 9. Please tell me something about your neighbourhood. (Can) ........................................................................................................................................................ 10. Oranges are cheaper than apples. (expensive) ........................................................................................................................................................