1. Tardigrade
  2. Question
  3. Physics
  4. Two Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45° with that of P1. The intensity of transmitted light through P2 is :-

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Two Polaroids $P_{1}$ and $P_{2}$ are placed with their axis perpendicular to each other. Unpolarised light $I_{0}$ is incident on $P_{1}.$ A third polaroid $P_{3}$ is kept in between $P_{1}$ and $P_{2}$ such that its axis makes an angle $45^\circ $ with that of $P_{1}.$ The intensity of transmitted light through $P_{2}$ is :-

NTA AbhyasNTA Abhyas 2020

Solution:

Solution
$I_{1}=\frac{I_{0}}{2}$
$I_{2}=\frac{I_{0}}{2}cos^{2}45^\circ =\frac{I_{0}}{4}$
$I_{3}=\frac{I_{0}}{4}cos^{2}45^\circ =\frac{I_{0}}{8}$