Question 1 :
A ray of light is incident normally on a plane glass slab. What will be the angle of refraction ?

Question 2 :
According to Snell's Law of refraction, the ratio of the refractive index is related to the inverse ratio of the ____ of the angles.<br/>

Question 4 :
Due to refraction, when seen from outside, a coin placed under water in a bowl, appears to

Question 6 :
When a ray of light passes from an optically more dense medium to a less dense medium, it:

Question 7 :
According to laws of refraction, refraction of light at the boundary between two different regions follow:

Question 10 :
If a ray of light goes from a rarer medium to a denser medium , will it bend towards the normal or away from it ?

Question 11 :
A unit vector along the incident ray of light is $\hat{i}$. The unit vector for the corresponding refracted ray of light is $\hat{r}\cdot \hat{n}$, a unit vector normal to the boundary of the medium and directed towards the incident medium. If $\mu$ is the refractive index of the medium, then Snell's law (second law) of refraction is :

Question 12 :
Light enters from denser to rarer medium. Choose the correct option.

Question 13 :
$ \dfrac{\sin i}{\sin r} =$constant, the value of constant depends upon<br/>a) Pair of media <br/>b) Color of incident light<br/>c) Wave length <br/>d) Refracting nature of material<br/>

Question 14 :
The bending of light ray after passing through a medium is commonly known as :

Question 15 :
"Value of refractive index remains same for light rays with different wavelength and for a particular material"

Question 16 :
A fish in water (refractive index n) looks at a bird vertically above in the air If y is the height of the brid and x is the depth of the fish from the surface,then distance of thee bird as estimated by the fish is

Question 18 :
If in a plano-convex lens, the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm, then the refractive index of the material of lens will be

Question 19 :
<span>Fill in the blanks:</span><div>The phenomenon of change in the _____of light when it passes from one transparent medium to another is refraction.</div>

Question 20 :
A rod is placed in a beaker of full of water. It appears to be bent inside the water. Which of the following property of light is responsible for the rod appearing to be bent?

Question 21 :
A ray of light travels from ethanol into air. If the angle of incidence of the ray at the boundary is $30^0$ and the refractive index of ethanol is 1.36, what is the angle of refraction of the ray as it emerges out of ethanol?

Question 22 :
A light ray travels at some angle (not head on) from water in a rectangular aquarium, through the glass side, and out into the air. The indices of refraction for water, glass, and air are $1.33$, about $1.6$, and $1.0$, respectively.<br>Rank the materials according to the angles made by the light ray with the normal in each, greatest first

Question 28 :
A ray of light is incident on a glass slab making an angle of $60^0$ with the surface. Calculate the angle of refraction in glass and the velocity of light in glass if the refractive index of glass and the velocity of light in air are 1.5 and 3.0 x 10$^{8}$ m/s respectively.<br/>

Question 30 :
If $\mu_0$ be the relative permeability and $K_0$ the electric constant of a medium, its refractive index is given bym