Q

A student places an object 15 cm in front of a concave mirror of focal length 10 cm. If the image formed is real, what is the magnification produced by the mirror?

RRB Group-D 06/08/2026 (12:45 PM - 2:15 PM) 2026
✓ Answer: A -2
With u = -15 cm and f = -10 cm, 1/v = 1/f - 1/u = -1/30, giving v = -30 cm. Magnification m = -v/u = -2.
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