CBSE Class 8 Science Light Assignment Set B

CBSE Class 8 Science - Light (2)

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CLASS VIII UT 2

LIGHT

Assignment

1. Draw a diagram to show the reflection of light from a plane mirror. Label the

following on the diagram:

(a) Plane mirror (b) Incident ray (c) Reflected ray

(d) Point of incidence (e) Normal (f) Angle of incidence

(e) Angle of reflection.

2. How many reflected rays can there be for a given single incident ray falling on a

plane mirror?

3. State the Laws of Reflection of Light.

4. An incident ray makes an angle of 750 with the surface of a plane mirror. What

will be the angle of reflection?

5 A ray of light is incident normally {perpendicularly} on a plane mirror. Where

will this ray of light go after reflection from the mirror ?

6 What is the difference between regular reflection and diffuse reflection of light ?

7 State whether the following statement is true or false :

Diffuse reflection means the failure of the laws of reflection of light.

8 Draw a labeled diagram showing how a plane mirror forms an image of a point

object placed in front of it.

9 If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it

be from its image ?

10 You see your image in a plane mirror? State two characteristics of the image so

formed.

11 Name the phenomenon responsible for the following effect:

When we sit in front of a plane mirror and write with our right hand, it appears in

the mirror that we are writing with the left hand.

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