When the angle of incidence is 60^(@) on...

When the angle of incidence is `60^(@)` on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

`sqrt2 xx10^(8) ms ^(-1)`

`sqrt3 xx10^(8) ms ^(-1)`

`2 xx10^(8) ms ^(-1)`

`3 xx10^(8) ms ^(-1)`

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