When unpolarised light is passed through crossed polaroids, then light passing through first polaroid

When unpolarised light is passed through crossed polaroids, then light passing through first polaroid
  1. also passes through second polaroid.
  2. partially passes through second polaroid.
  3. is blocked by second polaroid.
  4. passes with greater intensity.

Solution

Intensity passed by the second polaroid is given by $I=I_{0} \cos ^{2} \theta$ when $\theta=90^{\circ}, I=0$

Asked in: MHT CET 2020 (14 Oct Shift 2)

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