Embibe Experts Solutions for Chapter: Ray Optics, Exercise 12: Exercise (Conceptual Questions)

Two plane mirrors are inclined at an angle of $60°$ to each other. If an object is placed between them, then the number of images produced will be

A boy stands straight in front of a mirror at a distance of $30 \mathrm{cm}$ away from it. He sees his erect image whose height is $\frac{1}{5}$ his real height. The mirror he is using is:

A diminished virtual image can be obtained only in 

Critical angle of light passing from glass to air is minimum for

An achromatic convergent doublet of two lenses in contact has a power of $+2 \mathrm{D}$. The convex lens has power $+5 \mathrm{D}$. What is the ratio of the dispersive powers of the convergent and divergent lenses?

The magnifying power of the objective of a compound microscope is $7.$ If the magnifying power of microscope is $35,$ the magnifying power of eye lens will be:

If tube length of astronomical telescope is $105 \mathrm{cm}$ and magnifying power is $20$ for normal setting, calculate the focal length of objective.

A person can see clearly only up to a distance of $25 \mathrm{cm}$. He wants to read a book placed at a distance of $50 \mathrm{cm}$. What kind of lens does he require for his spectacles, and what must be its power?