A) Convex, +2.25 diopter
B) Concave, \[-0.25\]diopter
C) Concave, \[-0.2\]diopter
D) Convex, + 0.15 diopter
Correct Answer: B
Solution :
Maximum distance of distinct vision = 400 cm. So image of object at infinity is to be formed at 400 cm. Use lens formula \[\frac{1}{V}-\frac{1}{U}=\frac{1}{f}\] \[\frac{1}{-40}-\frac{1}{\infty }=\frac{1}{f}\] P=-0.25DYou need to login to perform this action.
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