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vanquy6406
2 năm trước
Cho tia tới SI hợp với gương phẳng GP một góc 50 0 như hình vẽ: a/ Hãy vẽ tia phản xạ và hãy tính hợp bởi tia tới và tia phản xạ. b/Giữ nguyên tia tới SI , muốn thu được tia phản xạ có phương thẳng đứng chiều từ trên xuống dưới thì đặt gương như thế nào? ( vẽ hình) nhanh lên giùm nhé
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