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nuxuka
2 năm trước
Cho một thấu kính hội tụ có tiêu cự f a) Xác định vị trí vật để ảnh tạo bởi thấu kính là ảnh thật b) Chứng tỏ rằng khoảng cách giữa vật thật và ảnh thật có một giá trị cực tiểu. Tính khoảng cách cực tiểu này xác định vị trí của vật lúc đó?
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