Physicshard · Past Paper
An object is placed at a distance of 12 cm from a concave mirror of focal length 8 cm. Find the image distance.
A-24 cm
B24 cm
C-4.8 cm
D4.8 cm
✓ Correct Answer: A — -24 cm
1/v = 1/f - 1/u = 1/(-8) - 1/(-12) = -1/8 + 1/12 = (-3+2)/24 = -1/24. So v = -24 cm.
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