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
Vertical plane
Horizontal plane
Plane making an angle of 45o with the vertical
Plane making an angle of 57o with the horizontal
Whenever unpolarised light is made incident at polarising angle then the reflected light is plane polarised in a direction perpendicular to the plane of incidence. Therefore in reflected light will vibrate in vertical plane with respect to plane of incidence.
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