Question

define critical angle and relation between critical angle and refractive index​

Answer 1

Critical angle → the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.

Relation →

When the angle of refraction is equal to 90°, the angle of incidence is called the critical angle, At any angle of incidence greater than the critical angle, the light cannot pass through the surface - it is all reflected. Total because all of the energy is reflected.

Answer 2

Answer:

✅CRITICAL ANGLE

• The angle of incidence for which the angle of refraction is 90°, then that angle is called as critical angle.

✅RELATION

• Critical angle = 1 / Refractive index

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