Embibe Experts Solutions for Chapter: Ray Optics, Exercise 13: Exercise (Previous Year Questions)

Which of these is not due to total internal reflection?

When a biconvex lens of glass having refractive index $1.47$ is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index:

A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices ${\mu }_1$ and ${\mu }_2$ and $R$ is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is :

An astronomical telescope has objective and eye-piece of focal length $40 \mathrm{cm}$ and $4 \mathrm{cm}$ respectively. To view an object $200 \mathrm{cm}$ away from the objective, the lenses must be separated by a distance:

Match the corresponding entries of Column $1$ with Column $2$. [Where m is the magnification produced by the mirror]

A person can see clearly object when they lie between $50 \mathrm{cm}$ and $400 \mathrm{cm}$ from his eye. 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:

The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is $30°$. On of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is: