Q. No.Which of the following statements indicates that light waves are transverse?
| 1. | Light waves can travel in a vacuum. |
| 2. | Light waves show interference. |
| 3. | Light waves can be polarized. |
| 4. | Light waves can be diffracted. |
An unpolarised light incident on a polariser has amplitude \(A\), and the angle between analyzer and polariser is \(60^{\circ}\). The light transmitted by the analyzer has an amplitude of:
1. \(A\sqrt{2}\)
2. \(\frac{A}{2\sqrt{2}}\)
3. \(\frac{\sqrt{3}A}{2}\)
4. \(\frac{A}{2}\)
When an unpolarized light of intensity \(I_0\) is incident on a polarizing sheet, the intensity of the light which does not get transmitted is:
| 1. | zero | 2. | \(I_0\) |
| 3. | \(\dfrac{I_0}{2}\) | 4. | \(\dfrac{I_0}{4}\) |
Five identical polaroids are placed coaxially with \(45^{\circ}\) angular separation between pass axes of adjacent polaroids as shown in the figure. (\(I_0\): Intensity of unpolarized light)
The intensity of light, \(I\),
emerging out of the \(5\)th polaroid is:
| 1. | \(\dfrac{I_0}{4}\) | 2. | \(\dfrac{I_0}{8}\) |
| 3. | \(\dfrac{I_0}{16}\) | 4. | \(\dfrac{I_0}{32}\) |
A plane-polarized light with intensity \(I_0\) is incident on a polaroid with an electric field vector making an angle of \(60^{\circ}\) with the transmission axis of the polaroid. The intensity of the resulting light will be:
| 1. | \(\dfrac{I_0}{4}\) | 2. | \(I_0\) |
| 3. | \(2I_0\) | 4. | \(\dfrac{I_0}{2}\) |
| 1. | \(60^\circ\) | 2. | \(75^\circ\) |
| 3. | \(30^\circ\) | 4. | \(45^\circ\) |
1. \(\dfrac{I}{2}\)
2. \(\dfrac{I}{3}\)
3. \(\dfrac{3I}{4}\)
4. \(\dfrac{2I}{3}\)
| 1. | \(\dfrac{{I}_0}{16}\) | 2. | \(\dfrac{{I}_0}4\) |
| 3. | \(\dfrac{{I}_0}2\) | 4. | \(\dfrac{{I}_0}{32}\) |
| 1. | both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to \(60^\circ\) and \(30^\circ,\) respectively. |
| 2. | transmitted light is completely polarized with angle of refraction close to \(30^\circ\) |
| 3. | reflected light is completely polarized and the angle of reflection is close to \(60^\circ\) |
| 4. | reflected light is partially polarized and the angle of reflection is close to \(30^\circ\) |
Two polaroids are in the path of an unpolarized beam of intensity \(I_0\) such that no light is emitted from the second polaroid. If a third polaroid, whose polarization axis makes an angle \(\theta\) with the polarization axis of the first polaroid, is placed between these polaroids, then the intensity of light emerging from the last polaroid will be:
1. \(\left ( \frac{I_{0}}{8} \right )\sin^{2}2\theta \)
2. \(\left ( \frac{I_{0}}{4} \right )\sin^{2}2\theta \)
3. \(\left ( \frac{I_{0}}{2} \right )\sin^{4}2\theta \)
4. \(I_{0}\sin^{2}2\theta \)
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