Question

what is Shadow? What conditions are essential for the formation of shadow?​

Answer 1

A shadow is a figures cast from the light. So, how this works is, if you imagine a paper and use like your phone flashlight, it will shine through it. But, when you do this using a solid object like a book, it will not be able to pass through, therefore casting a shadow.

Hope that helps!

Answer 2

black is not a colour

Explanation:

Shadow is black as i already told that black is not a colour

black is just absence of light