Question on: JAMB Physics - 2024
The power of a convex lens of focal length 20 cm is
A
0.05 D
B
0.50 D
C
5.00 D
D
50.00 D
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Correct Option: C
The power of a lens is the reciprocal of its focal length in meters.
- Convert focal length to meters: 20 cm = 0.20 m
- Calculate power: Power (P) = 1 / focal length (f) = 1 / 0.20 m = 5.0 D (diopters)
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