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kuborakaitokid
2 năm trước
biết rằng chiết suất của một chất thủy tinh đối với tia đỏ là 1,45 và đối với tia tím là 1,48 chiếu một tia sáng gồm 2 loại nói trên từ không khí vào chất thủy tinh đó với góc tới là 30 độ thì góc giữa 2 tia nói trên trong thủy tinh là
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