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By using two Polaroids, one can completely block all the light coming from an object.

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in Engineering Physics II by (679k points)
By using two Polaroids, one can completely block all the light coming from an object.

(a) True

(b) False

The question was asked during an internship interview.

Enquiry is from Polaroids topic in chapter Polarisation of Engineering Physics II

1 Answer

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Right choice is (a) True

The explanation: Imagine that one filter is placed such that all the horizontal vibrations are eliminated and only the vertical vibrations remain. If we adjust the second polaroid in such a way that all the vertical vibrations get blocked, then that would mean all the light coming from an object would be completely blocked. Thus, the given statement is true.

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