A ray of light travelling inside a recta...

A ray of light travelling inside a rectangular glass block of refractive index`sqrt 2 `is incident on the glass-air surface at an angle of incidence of `45^(@)`. The refractive index of air is one. Under these conditions the ray will

emerge into the air without any deviation

be reflected back into the glass

be absorbed

emerge into the air with an angle of refraction equal to `90^(@)`

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