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When the angle of incidence on a materia...

When the angle of incidence on a material is `60^(@)`, the reflected light is completely polarised. The velocity of the refracted ray inside the materials is (in m//sec^(-1))

A

`3xx10^(8)`

B

`(3/sqrt(2))xx10^(8)`

C

`sqrt(3)xx10^(8)`

D

`0.5xx10^(8)`

Text Solution

Verified by Experts

The correct Answer is:
C
`mu=tan 60^(@)=sqrt(3)`
`v=c/mu=(3xx10^(8))/sqrt(3)=sqrt(3)xx10^(8) m//sec`
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Knowledge Check

  • When the angle of incidence on a material is 60^(@) , the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in ms^(-1) )

    A
    `3 xx 10^(8)`
    B
    `((3)/(sqrt(2))) xx 10^(8)`
    C
    `sqrt(3) xx 10^(8)`
    D
    `0.5 xx 10^(8)`

  • The angle of incidence at which reflected light is totally polarised for reflection from air to glass (refractive index n) is

    A
    `sin^(-1)(n)`
    B
    `sin^(-1)((1)/(n))`
    C
    `tan^(-1)((1)/(n))`
    D
    `tan^(-1)(n)`

  • A beam of light strikes a glass plate at an angle of incident 60^(@) and reflected light is completely polarised than the refractive index of the plate is-

    A
    `1.5`
    B
    `sqrt(3)`
    C
    `sqrt(2)`
    D
    `(3)/(2)`

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