Fill in the blanks.

(a) Light propagates in …………… motion.

(b) Sun is a …………… source of light.

(c) …………… objects cast a shadow.

(d) A collection of rays coming from different directions which meet at a single point is called …………… beam.

(e) Blocking of the light of the sun by a heavenly body is called …………… .

State whether the following statements are true or false. Correct the false statements.

(a) Non-luminous objects like trees and chairs emit light of their own.

(b) A transparent material allows all the light to pass through.

(c) Translucent objects cast a dark shadow.

(d) The shape of shadow is independent of the object blocking light.

(e) A pinhole camera forms an inverted image.

Which of the following is an example of a transparent object?

1. Notebook
2. Wax paper
3. Cup
4. Spectacles

What do you call ray of lights that are emitted by a point source which travel in different directions?

1. Parallel beam
2. Convergent beam
3. Divergent beam
4. Ray