The expression for intensity (as shown in the figure) of transmitted light when a polaroid sheet is rotated between two crossed polaroids is:
[Given: \(I_0\) is the intensity of transmitted light from polariser \(\mathrm{A}\)]

  

1. \(I = \dfrac{I_{0}}{2} \sin^{2} 2 \theta\) 2. \(I = \dfrac{I_{0}}{4} \sin^{2} 2 \theta\)
3. \(I = \dfrac{I_{0}}{2} \cos^{2} 2 \theta\) 4. \(I = \dfrac{I_{0}}{4} \cos^{2} 2 \theta\)
Subtopic:  Polarization of Light |
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From NCERT
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Unpolarised light is incident on a plane glass surface. What should be the angle of incidence so that the reflected and refracted rays are perpendicular to each other?

1. 450
2. 670
3. 570
4. 370

Subtopic:  Polarization of Light |
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