A convex lens is in contact with a concave lens. The magnitude of the – InterviewSolution

1.	A convex lens is in contact with a concave lens. The magnitude of the ratio of their focal lengths is 23. Their equivalent focal length is 30 cm. What are their individual focal length? (in cm)
Answer» A convex lens is in contact with a concave lens. The magnitude of the ratio of their focal lengths is $\frac{2}{3}$ . Their equivalent focal length is $30 cm .$ What are their individual focal length? (in $cm$ )

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