Question

define critical angle at the interface of two transparent medium?​

Answer 1

Explanation:

Critical angle. The critical angle is the smallest angle of incidence that yields total reflection. For light waves incident from an "internal" medium with a single refractive index n1 , to an "external" medium with a single refractive index n2 , the critical angle is given by. , and is defined if n2 ≤ n1.

Answer 2

Critical angle is that angle above which TIR(total internal reflection) takes place

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