Light

Question 1

How is a red ball red?

Answer 1

A red ball is red because it absorbs all the colours except red, and

Question 2

What is reflection?

Answer 2

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

Question 3

What is refraction?

Answer 3

Refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the waves change in speed or by a change in the medium