A ray of light is incident normally on t...

A ray of light is incident normally on the prism `(mu = (3)/(2))` immersed in a liquid as shown in the figure. The largest value for the angle `alpha` so that ray is totally reflected at the face AC is `30^(@)`. The refractive index of the given liquid is

`(sqrt(3))/(2)`

`(3)/(4)`

`(4)/(3)`

`(3sqrt(3))/(4)`

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