Consider a light beam incident from air to a glass slab at Brewster\'s angle a
Channel: Doubtnut
Date: 2020-01-19

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 pependicular to the plane of the plaroid.