A ray of light is incident on the hypote...

A ray of light is incident on the hypotenuse of a right-angled prism after travelling parallel to the base inside the prism. If `mu` is the refractive index of the material of the prism, the maximum value of the base angle for which light is totally reflected from the hypotenuse is

`sin^(-1) ((1)/(mu))`

`tan^(-1) ((1)/(mu))`

`sin^(-1) ((mu - 1)/(mu))`

`cos^(-1) ((1)/(mu))`

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