Q.

A person with a defective sight is using a lens having a power of +2D. The lens he is using is

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a

Concave lens of focal length 0.5m

b

Convex lens of focal length 2.0m

c

Concave lens with focal length 2.0 m

d

Convex lens with focal length 0.5m

answer is D.

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Detailed Solution

f(in m)=1D=12m
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