Question

Image of an object at infinity is formed by a convex lens of focal length such that the size of the image is . If a concave lens of focal length is placed in between the convex lens and the image, at a distance from the convex lens, size of the new image is:

A

B

C

D

Hard
Updated on : 2022-09-05
Solution
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Correct option is A)

Without the concave lens, image is formed at a distance 30 cm from the convex lens. When concave lens is placed, it serves as the object for the concave lens.

Hence, for concave lens,

Given,

From lens formula,




Magnification of lens,

Magnification of lens,

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