Determine the focal length of a thin converging lens if the power is 5.0 dioptres
A
0.1 m
B
0.2 m
C
2.0 m
D
2.5 m
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Power of a lens = \(\frac{1}{f}\)
f = focal length
f = \(\frac{1}{p}\)
= \(\frac{1}{5}\)
= 0.2m
Source: Myschool Past Questions Archive (Record #46405)