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A beam of plane polarised light of large...

A beam of plane polarised light of large cross - sectional area and uniform intensity of `3.3Wm^(-2)` falls normally on a polarises (cross sectional are `3xx10^(-4)m^2` ) which rotates about its axis with an angular speed of 31.4 rad/s . The energy of light passing through the polariser per revolution , is close to :

A

`1.5xx10^(-4)J`

B

`5.0xx10^(-4)J`

C

`1.0xx10^(-4)J`

D

`1.0xx10^(-5)J`

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A beam of plane polarised light falls normally on a polariser (cross sectional area 3 xx 10^(-4)m^(2) ) which rotates about the axis of the ray with an angular velocity of 31.4 rad//s . Find the energy of light passing through polariser per revolution and the intensity of emergent beam, if flux of energy of the incident ray is 10^(-3) W .

A beam of plane polarised falls normally on a polariser (cross section area 3xx10^(-4),^(2)) Find the energy of light pssing through the polariser per revolution and the intensisty of the emergent beam if the flux of energy of the incident ray is 10^(-3)W .

Knowledge Check

  • A beam of unpolarised light having flux 10^(-2) watt falls normally on a polariser of cross sectional area 3 xx 10^(-4) m^(2) . The polariser rotates with an angular frequency of pi rad/s. The energy of liggt passing through the polariser per revolution will be

    A
    `10^(-4)` joule
    B
    `10^(-3)` joule
    C
    `10^(-2)` joule
    D
    `10^(-1)` joule

  • A beam of plane polarized light having flux 10^(-3) Watt falls normally on polarizer of cross sectional area 3x10^(-4) m^2. Polarizer rotates with angular frequency of 31.4 rad/s. Energy of light passes through the polarizer per resolution will be

    A
    `10^(-4) J`
    B
    `10^(-3) J`
    C
    `10^(-2) J`
    D
    `10^(-1) J`

  • A beam of plane polarized light falls normally on a polarizer of cross sectional area 3xx10^-4m^2 . Flux of energy of incident ray in 10^-3W . The polarizer rotates with an angular frequency of 31.4 rad//sec . The energy of light passing through the polarizer per revolution will be

    A
    `10^-7`Joule
    B
    `10^-3`Joule
    C
    `10^-2` Joule
    D
    `10^-1` Joule

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