Question

The refractive index of the material of a concave lens is   and is placed in the medium of refractive index . If , then which of the following ray diagram is correct:

A
option
B
option
C
option
D

None of these

Medium
Solution
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Correct option is D)

Since, the tendency of a concave lens is to diverge a parallel beam of light falling on the lens surface, it would show exactly the opposite behaviour if placed in a medium of higher refractive index than the material of the lens.
Thus, the correct option will be one in which a concave lens diverges a parallel beam of a light ray.

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