Question

name three man made source of light and their contribution in human life ​

Answer 1

1. Bulb
2. Torch
3. Searchlight

Bulb is used at home and it runs with the help of electricity.

Torch is used where bulb can't be used and it runs with the help of battery

Searchlight is used for a parallel beam of light in a large amount

Hope it will help .....

Answer 2

Answer:

Tube light :- It is very important in our life . It helps to see in the rooms or in the night.

Dam:- It is man made source. It helps in production of electricity

Gereneter:- As it converts chemical energy into electrical energy.

I hope it will help you