Question

what is light? explain it

Answer 1

light is form of energy which helps us to see.it doesn't require any medium to propagate.its speed is faster than any other form of energy.

Answer 2

Light is a electro magnetic radiation. Its velocity is approximately 3 * 10^8 m/s. 

As it is very fast it cannot be seen through naked eyes. The thing which we see is actually it's refection. Light also follows laws of refelction