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Questions  >>  CBSE XII  >>  Physics  >>  Wave optics
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Consider a light beam incident from air to a glass slab at Brewster's angle as shown. A Polaroid is placed of the emergent ray at a point P and rotated about an axis passing through the center and perpendicular to the plane of the polaroid .

For a particular orientation there shall be darkness as observed through the PolaroidThe intensity of light as seen through the Polaroid shall be independent of the rotation The intensity of light as seen through a minimum but not zero for two orientation of the PolaroidThe intensity of light as seen through the Polaroid go through a minimum for four orientation of the Polaroid 

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