MCQ
A lens of focal power $0.5 D$ is
- AA convex lens of focal length $0.5 \mathrm{~m}$
- BA concave lens of focal length $0.5 \mathrm{~m}$
- ✓A convex lens of focal length $2 \mathrm{~m}$
- DA concave lens of focal length $2 \mathrm{~m}$
✓
Answer
Correct option: C.
A convex lens of focal length $2 \mathrm{~m}$
$P=\frac{1}{f} \Rightarrow f=\frac{1}{0.5}=2 m$
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