A ray is incident from a medium of refractive index 2 into a medium of refractive index 1 . The critical angle is

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Aicharya · Accepted Answer

Critical angle is defined as the angle of incidence, when light is travelling from denser medium to rarer medium, at which the angle of refraction is $90 °$ . Therefore,
$i_{c} = \sin^{- 1} (\frac{μ_{2}}{μ_{1}}) = \sin^{- 1} (\frac{1}{2}) = 30 °$

A ray is incident from a medium of refractive index 2 into a medium of refractive index 1 . The critical…

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