Question: Q. 2. Two polaroid $A$ and $B$ are parallel. How be a third polaroid $C$ placed between $A$ and $B$ so that the intensity of the emergent light be (i) zero (ii) maximum?
Solution:
Ans. (i) $C$ should be perpendicular to polaroids $A$ and $B$. $1 / 2$
(ii) $C$ should also be parallel to polaroids $A$ and $B$.
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