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Two lenses shown in figure. Are illumina...

Two lenses shown in figure. Are illuminated by a beam of parallel light from the left. Lens B is then moved slowly toward lens A. the beam emerging from lens B is

A

always diverging

B

initially parallel and then diverging

C

always parallel

D

initially converging and then parallel

Text Solution

Verified by Experts

The correct Answer is:
b.
Initially, the object for lensB( the lens formed by lens A) is at its focus, so rays are parallel.
As the separation between A and B decreses, the object for B is lying away from focus and hence, the rays are diverged.

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