Optics 3 Question 17
17. A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is
(2005, 2M)
(a)
(b)
(c) 75,50
(d)
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Answer:
Correct Answer: 17. (d)
Solution:
- Let focal length of convex lens is
From the given condition,
Therefore, focal length of convex lens
