Polarized light incident on a polaroid. Let \(I_{0}\) be the intensity of light transmitted by this polaroid. Now, a very large number (say \(N\)) of polaroids are placed in a row with their axes displaced through a small angle \(\theta\) successively. If the last polaroid is crossed to the first one, the intensity of light transmitted by the last polaroid is about:

1. Zero 2. \(\dfrac{I_{0}}{2}\)
3. \(I_{0}\) 4. \(\dfrac{I_{0}}{N}\)
Subtopic:  Polarization of Light |
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If an unpolarised light is incident on a plane surface of refractive index \(\sqrt3\) at Brewster's angle, then the angle of refraction is:
1. \(0^\circ\)
2. \(30^\circ\)
3. \(60^\circ\)
4. \(90^\circ\)
Subtopic:  Polarization of Light |
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A polariser and an analyser are inclined to each other at an angle \(\theta\). If the intensity of polarised light emerging from analyser is \(I_0\) then the intensity of unpolarized light incident on the polariser will be:
1. \(\large\frac{I_0}{\cos ^2 \theta}\) 2. \(\large\frac{I_0}{2\cos ^2 \theta}\)
3. \(\large\frac{2I_0}{\cos ^2 \theta}\) 4. \({\large{I_0\over 2}} \cos^2\theta\)
Subtopic:  Polarization of Light |
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