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A beam of polarized light is sent into a...

A beam of polarized light is sent into a system of two polarizing sheets . Relative to the polarization diretion of that incident light the polarizing direction of the sheets are at angles `theta ` for the first sheet and `90^(@)` for the second sheet . (a ) If 0.20 of the incident intensity is transmitted by the two sheets what is `theta` (b ) What percentage of the incident intensity is transmitted if the first sheet angle is reduced to `0^(@)` ?

Text Solution

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`theta =32^(@) ` or `58^(@)` , (b) the transmitted intensity is zero
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Knowledge Check

  • For linearly polarized light the plane of polarization is

    A
    Perpendicular to both the direction of polarization and the direction of propagation
    B
    Perpendicular to the direction of polarization and parallel to the direction of propagation
    C
    Parallel to the direction of polarization and perpendicualar to the direction of propagation
    D
    Parallel to both the direction of polarization and the direction of propagation

  • A ray of unpolarised light is incident on a glass plate at the polarizing angle if incident 57^@ . Now,

    A
    both the reflected and transmitted rays will be completely polarised
    B
    the reflected ray will be completely polarised and transmitted ray will be partially polarised
    C
    the reflected ray will be partially polarised and transmitted ray will be completely polarised
    D
    both the reflected and the transmitted rays will be partially polarised.

  • In a system of two polarisers , it is found that the intensity of light from the second polarized is half from that of the first polariser .The angle between their pass axes is

    A
    `60^@`
    B
    `30^@`
    C
    `0^@`
    D
    `45^@`

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    In Fig 32-25 unpolarized light is sent into a system of three polarizing sheets. Which transmits 0.0500 of the initial light intensity . The polarizing directions of the first and third sheets are at angles theta_(1)=0^(@) and theta_(3) =90^(@) . What are the (a) smaller and (b ) larger possible values of angle theta_(2)( lt 90^(@) ) for the polaring direction of sheets 2?

    An unpolarizing beam of light is incident on a group of four palarizing sheets, which are arranaged in such a way that the characteristic direction of each polarizing sheet makes an angle of 30^(@) with that of the preceding sheet. What fraction of incident unpolarized light is transmitted ?

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