JEE Mains · Physics · STD 12 - 10. Wave optics
An unpolarized light of certain intensity passes through a combination of two polarizers whose transmission axes are at \(30°\) and \(90°\), respectively, with respect to the horizontal axis. A third polarizer with its transmission axis at \(60°\) with the horizontal axis is placed between the two existing polarizers. The ratio of the output intensities with and without the third polarizer is ______.
- A \(3/4\)
- B \(4/3\)
- C \(9/4\)
- D \(4/9\)
Answer & Solution
Correct Answer
(C) \(9/4\)
Step-by-step Solution
Detailed explanation
Let the intensity of the incident unpolarized light be \(I_0\). After passing through the first polarizer, the intensity becomes \(I_1 = \dfrac{I_0}{2}\). Without the third polarizer, the light passes directly from the first polarizer (at \(30^{\circ}\)) to the second polarizer…
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