Consider a light beam incident from air to a glass slab at Brewster’s angle as shown in…
Physics · Class 12 · CBSE — Wave Optics
Consider a light beam incident from air to a glass slab at Brewster’s angle as shown in figure. A polaroid is placed in the path of the emergent ray at point P and rotated about an axis passing through the centre and perpendicular to the plane of the polaroid. Which of the following statement is true?
For a particular orientation there shall be darkness as observed through the polaroid.
- The intensity of light as seen through the polaroid shall be independent of the rotation.
- The intensity of light as seen through the polaroid shall go through a minimum but not zero for two orientations of the polaroid.
- The intensity of light as seen through the polaroid shall go through a minimum for four orientations of the
polaroid.
Answer
(A) For a particular orientation there shall be darkness as observed through the polaroid.
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