Physicsmedium · Past Paper
If the image distance (v) is 20 cm and object distance (u) is -10 cm for a lens, what is the magnification?
A+2
B-2
C+0.5
D-0.5
✓ Correct Answer: B — -2
Magnification m = v/u = 20 / (-10) = -2. The image is real, inverted, and double the size.
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