Question

1) What is light? 

2) What is source of light? 

3) How do you classify the light sources? 

4) What are the different types of light beams? Explain.

Answer 1

1) Light is a form of energy. 

2) Light energy releases from different objects called sources of light. 

3) Sources which release light energy on their own are called natural sources. 

Ex: sun, stars. 

Sources which need the human involvement to release light energy are called manmade sources of light. 

Ex: torch light, candle, bulb etc. 

4) Actually, light is not a single ray, but a bundle of rays. This bundle of light rays are called beam of light rays. 

These are three types : 

i. Parallel beam of light rays : 

Light rays which travel parallel to each other are called Parallel beam of light rays. 

ii. Converging beam of light rays : 

“Light rays which travel from different directions to meet at a point are called as Converging beam of light rays”. 

iii. Diverging beam of light rays : 

“Light rays which travel from a source moving in different’ directions are called as Diverging beam of light rays.”