1.

If a glass plate refractive index is 1.732 is to be used as a polariser, what would be the angle of refraction?A. `30^(@)`B. `60^(@)`C. `45^(@)`D. `35^(@)`

Answer» Correct Answer - A
`mu_(g)=1.732,r_(p)=?`
`mu_(g)=tani_(p)`
`rArr" "i_(p)=tan^(-1)(1.732)=60^(@)`
`therefore" "mu_(g)=(sini_(p))/(sinr_(p))rArrsinr_(p)=(sini_(p))/(mu_(g))`
`rArr" "r_(p)=sin^(-1)((sin60^(@))/(tan60^(@)))=sin^(-1)(cos60^(@))`
`rArr" "r_(p)=30^(@)" "[thereforecos60^(@)=sin30^(@)]`


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