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dthong.gvkx
2 năm trước
Bài 44.4: Một thấu kính có một mặt phẳng và một mặt cong là mặt cầu lõn bán kính R. Một vật AB đặt trước thấu kính ta thu được ảnh A'B'có kid thước A'B' bàằng AB và cách vật 6 cm. a. Thấu kính trên là thấu kính gì? b. Tính khoảng cách từ vật đến thấu kính.
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