Question

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

• A. $=x$
  
• B. $<x$
  
• C. $>x$
  
• D. $=2x$
  

Answer 1

The correct option is A $=x$

Focal length of normal eye lens is equal to the distance between eye-lens and retina i.e, $x$ so that all rays converges on retina after passing through eye-lens, thus option $A$ is correct.