Physics, 18.06.2021 17:30 tyleeonfleek36

Dùng một gương phẳng G để hắt 1 chùm ánh sáng mặt trời hẹp xuống đáy một cái giếng cạn hình trụ thẳng đứng dọc theo trục của giếng. Tính góc hợp bởi mặt gương và đường thẳng đứng, biết rằng các tia sáng mặt trời nghiêng với mặt phẳng nằm ngang một góc 60°C

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Dùng một gương phẳng G để hắt 1 chùm ánh sáng mặt trời hẹp xuống đáy một cái giếng cạn hình trụ thẳn...

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