A beam of light travelling in water stri...

A beam of light travelling in water strikes a glass plate, which is also immersed in water. When the angle of incidence is ` 51^@`, the reflected beam is found to be plane polarised . What is the refractive index of glass if the refractive index of water is `(4)/3`? `[tan 51^(@)=1.235]`

1.605

1.305

1.33

1.805

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