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Physics, 24.07.2021 18:30 mirianplacencia27

2 thấu kính hội tụ có l1 và l2 cùng trục chính có tiêu cự là f1=30cm, f2=20cm. Quang tâm o1 và o2 của 2 thấu kính đó cách nhau 40cm.Điểm sáng A nằm trong khoảng giữa 2 thấu kính l1 và l2 cho ảnh A1 và A, cho A dao động điều hòa theo phương vuông góc với trục chính và có vị trí cân bằng nằm trên trục chính. Khi đó ảnh A1 và A2 cũng dao động theo phương vuông góc với trục chính và có đồ thị độ x(trục ox theo phương vuông góc trục chính) theo thời gian như hình vẽ.Diện tích tam giác A1AA2 lớn nhất gần bằng

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2 thấu kính hội tụ có l1 và l2 cùng trục chính có tiêu cự là f1=30cm, f2=20cm. Quang tâm o1 và o2 củ...

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