Refraction

Q.

When light enters normally into turpentine oil from air, its speed ___

1. increases

2. remains same

3. can’t say

4. decreases

Q.

Bending of light when it travels from one medium to another is termed as______.

1. reflection

2. refraction

3. diffusion

4. scattering

Q.

The bending of light when it travels from one medium to another having different refractive indices is called ____.

1. Reflection

2. Refraction

3. Fractions

4. Absorption

Q.

The floor of the swimming pool looks shallower that what it really is. What is the phenomenon responsible for it?

1. Eye defect

2. Diffusion of light

3. Reflection of light

4. Refraction of light

Q. When light is travelling from one medium to another and $\frac{sini}{sinr}$ > 1, then the light will bend away from normal.

1. True
2. False

Q.

An object is immersed in a fluid. In order that the object becomes invisible, it should

1. have refractive index exactly matching with that of the surrounding fluid

2. absorb all light falling on it

3. behave as a perfect reflector

4. have refractive index one

Q.

When a light ray travels from medium 1 to 2, in which of the following cases it bends towards the normal?

1. Air to glass
2. Honey to water
3. Water to air
4. Glass to air

Q.

If the refractive index of a material of equilateral prism is $\sqrt{3}$, then angle of minimum deviation of the prism is

1. ${30}^{\circ }$

2. ${45}^{\circ }$

3. ${60}^{\circ }$

4. ${75}^{\circ }$

Q.

No refraction occurs when the light ray incident is ___ a boundary of two medium.

1. normal to

2. parallel to

3. curved on

4. antiparallel to

Q. Turpentine Oil is optically less dense than water

1. True
2. False