Question

describe critical angle and total internal reflection of light​

Answer 1

Answer:-

The critical angle occurs when the incident angle causes the angle of refraction to be 90 degrees from the normal .

Total internal reflection occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.

Answer 2

Explanation:

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.