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quocdongqh
2 năm trước
2/ Một vật sáng AB cao 1cm vuông góc với trục chính của một TKHT có tiêu cự bằng 10cm.Vật AB đặt cách thấu kính một đoạn 15cm. a/Tính độ lớn ảnh A’B’? b/Tính khoảng cách từ ảnh đến thấu kính?
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