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Unpolarised light passes through a polar...

Unpolarised light passes through a polariser and analyser which are at an angle of `45^(@)` with respect to each other. The intensity of polarised light coming fromanalyse is `5W//m^(2)` . The intensity of unpolarised light incident on polariser is

A

`5 sqrt(3) // m^(2)`

B

`10 W // m^(2)`

C

`20 W // m^(2)`

D

`5 (sqrt(3))/(4) W // m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`I = (I_(0))/(2) cos^(2) phi`
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Knowledge Check

  • Unpolarised light of intensity 32 W//m^(2) passes through a polariser and analyser which are at an angle of 30^(@) with respect to each other. The intensity of the light coming from analyser is

    A
    `16sqrt(3)W//m^(2)`
    B
    `12W//m^(2)`
    C
    `16W//m^(2)`
    D
    `14W//m^(2)`

  • The polariser and analyser are inclined to each other at 60^(@) . The intensity of polarised light emerging from polariser is I. The intensity of the unpolarised light incident on the polariser is

    A
    I
    B
    8I
    C
    4I
    D
    2I

  • The amplitude of polarised light transmitted through a polariser is A. The amplitude of unpolarised light incident on it is

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

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