Ray Optics

NEET level, single correct, medium

3 of 295

Question 3 of 295

A convex lens of focal length f=20 cmf = 20\,\text{cm} forms a real image of same size as object. Object distance is:

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Answer: (A) 40 cm40\,\text{cm}

Real image of equal size is formed when object is placed at 2f=2×20=40 cm2f = 2 \times 20 = 40\,\text{cm}.

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