The critical angle for a light travelling from denser to rarer medium – InterviewSolution

1.	The critical angle for a light travelling from denser to rarer medium is defined as the angle of incidence at which the light refracts at 90∘(angle of refraction). If a ray of light travels from water ( μw) to air ( μa), find the critical angle.
Answer» The critical angle for a light travelling from denser to rarer medium is defined as the angle of incidence at which the light refracts at $90^{\circ}$ (angle of refraction). If a ray of light travels from water ( $μ_{w}$ ) to air ( $μ_{a}$ ), find the critical angle.

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