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JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Polarisation of Light

  • question_answer
    Figure represents a glass plate placed vertically on a horizontal table with a beam of unpolarised light falling on its surface at the polarising angle of 57o with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a          [CPMT 1988]

    A)            Vertical plane

    B)            Horizontal plane                 

    C)            Plane making an angle of 45o with the vertical

    D)            Plane making an angle of 57o with the horizontal

    Correct Answer: A

    Solution :

                       When unpolarised light is made incident at polarising angle, the reflected light is plane polarised in a direction perpendicular to the plane of incidence.  Therefore \[\overrightarrow{E}\] in reflected light will vibrate in vertical plane with respect to plane of incidence.


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