Page 64 - Science Class 6 Times Publication

2. Answer these questions in very short:
a. What is light ?

b. How does light help us to see?
c. What is the speed of light in air ?
d. Give an example each of cold and natural source of light.

e. Is an oiled sheet of paper transparent or translucent? Give
reasons.

3. Give reasons:
a. The moon is a non-luminous object.
b. The glass is a transparent object.

c. The light from the moon does not provide heat.

4. Differentiate between:
a. Luminous and non-luminous bodies.
b. Transparent and translucent objects.
c. Transparent and opaque objects.

5. Answer these questions in detail:

a. Explain the sources of light in brief.
b. Explain the terms translucent and opaque with examples.
c. What do you mean by luminous bodies ? Give examples.

d. What do you mean by non-luminous bodies ?Give examples.
e. How can you show that the light travels in a straight line ?

f. Explain the rectilinear propagation of light with a diagram.
6. Diagrammatic questions:

a. Name the following diagrams and classify them as luminous
and non-luminous bodies.

Times' Crucial Science and Environment 60 Book 6