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  4. 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

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Q. 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 $57^{\circ}$ with the normal. The electric vector in the reflected light on screen $S$ will vibrate with respect to the plane of incidence in aPhysics Question Image

Wave Optics

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 $\vec{E}$ in reflected light will vibrate in vertical plane with respect to plane of incidence.