Question

Select One Correct Option from the following: A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is 3/2. Their equivalent focal length is 30 cm. What are their individual focal lengths?
(A) −75 cm, 50 cm
(B) −10 cm, 15 cm
(C) 75 cm, 50 cm
(D) −15 cm, 10 cm.

Answer 1

c option is correct.
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Answer 2

(A) −75 cm, 50 cm

(B) −10 cm, 15 cm

✴️ (C) 75 cm, 50 cm

(D) −15 cm, 10 cm.