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 Aug, 2026 (12:45 PM - 2:15 PM) 2026
✓ Answer: A −2
Mirror formula gives v = −30 cm. Magnification m = −v/u = −(−30)/(−15) = −2, so the image is real, inverted and twice the size.
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