MCQ
A person cannot see distinctly objects kept beyond 2m. This defect can be corrected by using a lens of power:
- A+0.5D
- ✓-0.5D
- C+0.2D
- D-0.2D
✓
Answer
Correct option: B.
-0.5D
This person is suffering from myopia. He needs a concave lens and hence power would be in negative.
$\text{P}=\frac{1}{\text{f}}=\frac{1}{2\text{m}}=0.5\text{D}$
$\text{P}=\frac{1}{\text{f}}=\frac{1}{2\text{m}}=0.5\text{D}$
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