The refractive index of the material of a concave lens is μ and is placed in the medium of refractive index μ1. If μ1>μ, then which of the following ray diagram is correct:
None of these
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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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