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A lens has a power of + 4.0 it is

(a) A convex lens of focal length 4 m

(b) A concave lens focal length 4 m

(c) A convex lens of focal length 0.25 m

(d) A concave lens of focal length 0.25m

1 Answer

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by (17.5k points)

Correct Answer is (c) A convex lens of focal length 0.25 m

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