LIGHT

LIGHT 

   

 

                             Light or a visible light is electromagnetic radiation . That can be detected by the human eye. The main source of natural light on earth is the sun .Visible lights is usually defined is having wavelengths in the range of 400-700 nanometers corresponding to frequencies of 750-420 terahertz between the infrared and the ultraviolet. There are many sources of light. A body at a given temperature emits a characteristic spectrum of black body radiation. sunlight provides the energy that green plants use to create sugars mostly in the form of starches which release energy into the living things that digest them. This process called photosynthesis.

1. What is light ?

       Light or a visible light is electromagnetic radiation. that can be detected by the human eye.

2.What is the main source of light on earth?

         The main source of natural light on earth is sun.