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Reflection Of Light (Questions)

Soumi R.
06/03/2018 0 0

1. Question:

Define reflection of light.

Answer:

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.

Answer:   

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

3. Question:

What is meant by diffused reflection?

Answer:   

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.

Answer:   

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?

Answer:   

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.

Answer:   

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

7. Question:  

Define magnification.

Answer:   

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?

Answer:   

Smooth polished surfaces cause regular reflection.

9. Question:  

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

Answer:   

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?

Answer:   

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

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