H C Verma Solutions for Chapter: Optical Instruments, Exercise 2: OBJECTIVE I

The muscles of a normal eye are least strained when the eye is focussed on an object.

When objects at different distances are seen by the eye, which of the following remains constant?

A person $A$ can clearly see objects between $25 \mathrm{cm}$ and $200 \mathrm{cm}.$ Which of the following may represent the range of clear vision for a person $B$ having muscles stronger than $A$, but all other parameters of eye identical to that of $A$?

The focal length of a normal eye-lens is about

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

A man wearing glasses of focal length $+1 \mathrm{m}$ cannot clearly see beyond $1 \mathrm{m}$

An object is placed at a distance $u$ from a simple microscope of focal length $f$. The angular magnification obtained depends

To increase the angular magnification of a simple microscope, one should increase