A beam of unpolarised light of intensity
Question:

A beam of unpolarised light of intensity $\mathrm{I}_{0}$ is passed through a polaroid $\mathrm{A}$ and then through another polaroid $\mathrm{B}$ which is oriented so that its principal plane makes an angle of $45^{\circ}$ relative to that of $\mathrm{A}$. The intensity of the emergent light is :-

  1.  $\mathrm{I}_{0}$

  2. $\mathrm{I}_{0} / 2$

  3. $\mathrm{I}_{0} / 4$

  4. $\mathrm{I}_{0} / 8$


Correct Option: , 3

Solution:

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