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applebloom246
2 năm trước
Một vật AB có độ cao h=1cm được đặt vuông góc trước một thấu kính phân kì có tiêu cự f=12cm . Điểm A nằm trên trục chính của thấu kính và cách thấu kính một khoảng d=24cm a) Dựng ảnh A'B' của AB tạo bởi thấu kính đã cho b) Bằng kiến thức hình học hãy tính chiều cao h' của ảnh và tính khoảng cách d' từ ảnh tới thấu kính
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