Question

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

Answer 1

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In Optics, The angle of incidence to which the angle of refraction is 90° is called the critical angle.

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Critical Angle And Refractive Index Formula.

FormulaSI UnitCritical angle to Refractive indexSinC=\frac{1}{\mu _{b}^{a}}degree

Answer 2

Answer:

The angle of incidence to which the angle of refraction is 90° is called the critical angle. The ratio of velocities of a light ray in the air to the given medium is a refractive index. Thus, the relation between the critical angle and refractive index can be established as the Critical angle is inversely proportional to the refractive index.