JEE Mains · Physics · STD 12 - 10. Wave optics
In a Young's double slit experiment, three polarizers are kept as shown in the figure. The transmission axes of \(P_1\) and \(P_2\) are orthogonal to each other. The polarizer \(P_3\) covers both the slits with its transmission axis at \(45^{\circ}\) to those of \(P_1\) and \(P_2\). An unpolarized light of wavelength \(\lambda\) and intensity \(I_0\) is incident on \(P_1\) and \(P_2\). The intensity at a point after \(P_3\) where the path difference between the light waves from \(s_1\) and \(s_2\) is \(\frac{\lambda}{3}\), is _______.
- A \(\frac{I_0}{2}\)
- B \(\frac{I_0}{4}\)
- C \(\frac{\mathrm{I}_0}{3}\)
- D \(I_0\)
Answer & Solution
Correct Answer
(B) \(\frac{I_0}{4}\)
Step-by-step Solution
Detailed explanation
after passing through third poleriser, Intensity of both the waves must be \(\frac{\mathrm{I}_0}{4}\) now, at a point where path diff is \(\frac{\lambda}{3}\), phase difference…
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