Q

A convex mirror has a focal length of 20 cm. If an object is placed 40 cm from the mirror, what will be the nature and relative size of the image?

RRB Group-D 05/08/2026 (9:00 AM - 10:30 AM) 2026
✓ Answer: D Virtual, smaller than the object
Using f = +20 cm and u = -40 cm gives v = +13.33 cm and m = +1/3. The image is virtual, erect and diminished.
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