Q

An object is 20 cm from a concave mirror of focal length 10 cm. What is the image distance?

RRB Group-D 20/08/2026 (12:45 PM - 2:15 PM) 2026
✓ Answer: B 20 cm in front of the mirror
The object is at the centre of curvature, 2f from the pole, so the real image forms there too: 20 cm in front.
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