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Question

The 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 57° with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a


A
vertical plane
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B
horizontal plane
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C
plane making an angle of 45° with the vertical
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D
plane making an angle of 57° with the horizontal
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Solution

The correct option is A vertical plane

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 E in reflected light will vibrate in the vertical plane with respect to the plane of incidence.


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