A ray of light originating in oil (n=1.2...

A ray of light originating in oil `(n=1.21)` is incident at the Brewster angle upon a flat surface of a quartz crystal `(n=1.458)`. Determine the angle of incidence for this ray.

`0.82^(@)`

`40^(@)`

`1.2^(@)`

`50^(@)`

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