Light

Light Worksheet-1

1. A person 1 m in front of a plane mirror seems to be ____ m away from his image.

2. If you touch your-ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _____.

3. The size of the pupil becomes ____ when you see in dim light.

4. Night birds have ____ cones than rods in their eyes.

5. The ray, which strikes any surface is called _____ ray.

6. The ray, which return back after strike the surface is called _____ ray.

Light Worksheet-2

1. Math the following:

2. Angle of incidence is equal to the angle of reflection.

A. Always                                       B. Sometimes

C. Under special condition        D. Never

3. Image formed by a plane mirror is:

A. Virtual, behind the mirror and enlarged.

Light Worksheet-3

1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.

2. Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the law of reflection?

3. Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.

(a) Polished wooden table

(b) Chalk powder

(c) Card board surface

(d) Marble floor with water spread over it.

(e) Mirror