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Bài 2: Trên hình, hãy vẽ một tia sáng tới SI chiếu lên một gương phẳng M. Hãy vẽ tia phản xạ.
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Bài 2: Trên hình, hãy vẽ một tia sáng tới SI chiếu lên một gương phẳng M. Hãy vẽ tia phản xạ....
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