The distance of the eye lens from the retina is x. For a normal eye, the maximum focal length of the eye lens is :

Foundation

Physics Foundation

Human Eye And Colorful World

refraction from lens

Question

The distance of the eye lens from the retina is x. For a normal eye, the maximum focal length of the eye lens is :

> x

< x

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

The distance of eye lens from retina, v = x

focal length of the eye lens will be maximum when object is at infinity ( u = –∞)

$∵ \frac{1}{f} = \frac{1}{v} - \frac{1}{u}$

$\frac{1}{f} = \frac{1}{x} - \frac{1}{(- \infty)} ∵ \frac{1}{\infty} = 0$

So, f = x