MCQ
A man suffering from short sight is unable to see objects distinctly at a distance greater than $2\,m.$ The power of lens required to correct this defect should be.......$D$
- A$+0.5$
- B$-2$
- C$+2$
- ✓$-0.5$
✓
Answer
Correct option: D.
$-0.5$
d
The person suffering from short sightedness should use a concave lens so that the image falling in front of the lens will be formed at the retina. The power of concave lens should be
The person suffering from short sightedness should use a concave lens so that the image falling in front of the lens will be formed at the retina. The power of concave lens should be
$P\, = \, - \frac{1}{{{f_{(m)}}}}\, = \,\frac{1}{2}\, = \, - 0.5\,D$
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