Question

what is referaction ?explain

Answer 1

when light fall on surface it bounces off the surface. This is called reflection

Answer 2

Hey,

Thanks for asking the question.

Here is your answer:-
First of all,
I want to clear that there is no word 'referaction'. The correct word is 'refraction'.

Refraction is the change in the direction of wave propagation. This happens when a wave from one transparent medium, for example-air, to another transparent medium, for example-water.
This can occur in many waves for instance, light waves, sound waves, etc.
Now,
Let's discuss about refraction of any one of the waves for more details.

✴LIGHT WAVES
As we know, light travels in a straight line path in a medium. But when a ray of light travelling in one transparent medium falls obliquely on the surface of another transparent medium, it travels in another medium in a direction different from its initial. This is called refraction of light.