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# Reflection Of Light (Questions)

Soumi Roy
06/03/2018 0 0

1. Question:

Define reflection of light.

The phenomenon by which a ray of light changes the direction of propagation when it strikes a boundary between different media through which it cannot pass is described as the reflection of light.

2. Question:

Name the two types of reflection.

The two types of reflection are regular reflection and irregular or diffused reflection.

3. Question:

What is meant by diffused reflection?

In this type of reflection the different portions of the surface reflect the incident light in different directions and no definite image is formed but the surface becomes visible.

4. Question:

Name the phenomenon due to which we see the non-luminous objects.

It is due to diffused or irregular reflection of light that we see the non-luminous objects.

5. Question:

While looking at your image in a large plane mirror, if you touch your left ear it appears as if your image has touched the right ear. Why?

It is due to lateral inversion that we feel that the image has touched the right ear.

6. Question:

Name any one device based upon the principle of reflection of light by plane mirrors.

Periscope is a device based on the principle of reflection of light.

7. Question:

Define magnification.

The ratio of the height of the image to the height of the object is called the linear magnification.

8. Question:

What type of surface causes regular reflection?

Smooth polished surfaces cause regular reflection.

9. Question:

Define a) Centre of curvature b) Pole of a spherical mirror

Centre of curvature is the centre of the sphere of which the spherical mirror forms a part. Pole of a mirror is the midpoint of the aperture of the spherical mirror.

10. Question:

What kind of mirror is used in a car to view the traffic behind it?

Convex mirror is used in a car to view the traffic behind it.

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