Refraction Of Light - Practice Questions & MCQ

A transparent solid cylindrical rod has a refractive index of $\frac{2}{\sqrt{3}}$. It is surrounded by air. A light ray is incident at the mid-point of one end of the rod as shown in the figure.

The incident angle $\theta$ for which the light ray grazes along the wall of the rod is

A ray of light is incident on a medium with angle of incidence $i$ and refracted into a second medium with angle of refraction $r$. The graph of $\sin \mathrm{i}$ vs $\sin r$ is shown in the figures. Then the velocity of light in the first medium is $n$ times the velocity of light in the second medium. The value of $n$ should be.

Consider a light ray travelling in air is incident into a medium of refractive index $\sqrt{2}n$. The incident angle is twice that of the refracting angle. Then, the angle of incidence will be :

Time taken by light to travel in two different materials A and B of refractive indices ${\mu }_{\mathrm{A}}$ and ${\mu }_B$ of same thickness is $t_1$ and $t_2$ respectively. If $t_2-t_1=5\times {10}^{-10}\mathrm{s}$ and the ratio of ${\mu }_{\mathrm{A}}$ to ${\mu }_{\mathrm{B}}$ is $1:2$. Then, the thickness of material, in meter is: (Given $v_{\mathrm{A}}$ and $v_{\mathrm{B}}$ are velocities of light in A and B materials respectively.)

A ray of laser of a wavelength 630 nm is incident at an angle of ${30}^{\circ }$ at the diamond-air interface. It is going from diamond to air. The refractive index of diamond is 2.42 and that of air is 1 . Choose the correct option.

The following figure represents a wavefront AB that passes from air to another transparent medium and produces a new wavefront CD after refraction. The refractive index of the medium is (PQ is the boundary between air and the medium).       

Which of the following graphs represents the angle of deviation vs angle of incidence (i) for light ray going from rarer to denser?

A ray of light is incident at the glass-water interface at an angle I, it emerges finally parallel to the surface of the water, then the value of μg would be

If the wavelength of an EM wave in vacuum is $d_o$, then the wavelength of wave in the medium of refractive index 1.5 will be

If the speed of light  in a vacuum 10 m/s then the velocity of light in a medium of a refractive index 1.3 is