Question

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length is . If a concave lens of focal length is placed between the convex lens and the image at a distance of from the convex lens, calculate the new size of the images.

A

B

C

D

Hard
Solution
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Correct option is B)

For the image formed by convex lens in first case,
Magnification=
When concave lens is placed between the convex lens and image,
Thus
Total magnification in second case= Magnification by convex lens Magnification by concave lens
Thus

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