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QNEET-2016-Ph-1145: NEET 2016 Physics - Class 12 NEET-2016-Ph-1145 Solution: A person can see clearly objects only when they lie between 50…
A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity the type and power of the correcting lens the person has to use will be convex +2.25 diopter concave -0.25 diopter concave -0.2 diopter convex +0.15 diopter
Multiple Choice Options
- A convex, + 2.25 diopter
- B concave, _ 0.25 diopter
- C concave, _ 0.2 diopter
- D convex, + 0.15 diopter
Step-by-Step Verified Solution
Given u = 400 cm = 4 m
v = � and f = ?
Since, 1 f = 1 v _ 1 u
= 1 � _ 1 4
so, f = � 4 m
Hence, lens will be concave.
Now P = 1 f = 1 _ 4 = - 0.25 D