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Ray of light moving in water incidents on glass plate. Reflected light becomes completely plane polarised when incident at `51^(@)`, so refractive index of glass will be ...... [Refractive index of water `1.3 and tan 51^(@)=1.235]`

A

`1.33`

B

`1.805`

C

`1.605`

D

`1.305`

Text Solution

Verified by Experts

The correct Answer is:
C
`(n_(g))/(n_(w))=tan theta_(p)`
`:.n_(g)=n_(w)tan51^(@)`
`=1.3xx1.235`
`1.6055=1.605`
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