Physicseasy · Past Paper
What is the power of a lens having a focal length of 0.5 meters?
A+1 D
B-2 D
C+2 D
D+0.5 D
✓ Correct Answer: C — +2 D
Using the formula P = 1/f(m), we get P = 1/0.5 = +2 Dioptre.
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