Question

An object is placed at a distance of cm from a convex lens of focal length cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is :

A

B

C

D

Medium
Updated on : 2022-09-05
Solution
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Correct option is B)

For the lens,



Thus,

Now, for the mirror, this image acts as the object.


Also,
Hence, 


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