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

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

convex, +2.25 diopter

convex, -0.25 diopter

convex, -0.2 diopter

convex, +0.15 diopter

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Here, u=400 cm=4 m,v=∞,f=? Using lens formula, 1v-1u=1f or, 1∞-14=1f or, f=-4 mLens should be concave. Power of lens =1f=1-4=-0.25D

Watch 3-min video & get full concept clarity