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A ray of light strikes a glass plate at ...

A ray of light strikes a glass plate at an angle of `60^(@)` . If the reflected and refracted rays are perpendicular to each other, the refractive index of glass is

A

`(sqrt\3)/(2)`

B

`(3)/(2)`

C

`(1)/(2)`

D

`sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
According to the question , `I = 60^(@)`
`"Hence" , i + 90^(@) + r = 180^(@)`
`or, " " 60^(@) + 90^(@) + r = 180^(@)`
`or, " " r = 30^(@)`
`therefore " " (sini)/(sinr) = mu or, (sin60^(@))/(sin30^(@)) = mu`
`or, " " mu = sqrt(3)`
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