Q

An object is 30 cm from a concave mirror of focal length 20 cm. What is the distance of its real image?

RRB ALP & Technician 30/08/2018 / Shift-III 2018
✓ Answer: A 60 cm
1/v = −1/20 + 1/30 = −1/60. The image is 60 cm in front of the mirror.
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