Question

Please explain the conditions required for no refraction? Need a explanation not an answer​

Answer 1

Answer:

If the refractive indices are same in both medias then there will be no refraction and light will pass without any refraction. And when the incident ray is striking perpendicular to one media to another the light will pass without any refraction. 1) Condition for total internal reflection is : when r = 90 deg.

Answer 2

Answer:

Explanation:

This condition occurs at critical angle.

If incident ray is greater than a certain critical angle the ray doesn't get refracted but suffer reflection. This phenomenon is called total internal reflection.

The condition for this is that the ray should pass from denser medium to rarer medium.