Q

An object 1.2 cm high is placed 30 cm before a concave mirror of focal length 20 cm. A real image forms 60 cm from the mirror. What is its height?

RRB ALP & Technician 31/10/2018 / Shift-I 2018
✓ Answer: A -2.4 cm
m = -v/u = -2. Therefore h' = mh = -2 × 1.2 = -2.4 cm, indicating an inverted image.
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