A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is
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a
+ 0.5 D
b
+ 1.0 D
c
+ 2.0 D
d
- 1.0 D
answer is D.
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Detailed Solution
The image of object at infinity should be formed at 100 cm from the eye1f=1∞−1100=1100So power =−100100=−1DDistance is given in cm but P=1fin metres