Q. No.If the light is polarised by reflection, then the angle between reflected and refracted light is:
| 1. | \(\pi\) | 2. | \(\dfrac{\pi}{2}\) |
| 3. | \(2\pi\) | 4. | \(\dfrac{\pi}{4}\) |
| 1. | \(\dfrac{1}{\sqrt{3}}\) | 2. | \(\dfrac{3}{2}\) |
| 3. | \(\sqrt{3}\) | 4. | \(\dfrac{\sqrt{3}}{2}\) |
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. | \(\dfrac{I_0}{2}\) |
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. |
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. | \(\dfrac{I_0}{32}\) |
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. | \(\dfrac{I_0}{4}\) |
| 1. | \(\dfrac{I_0}{4}\) | 2. | \(\dfrac{I_0}{8}\) |
| 3. | \(\dfrac{I_0}{16}\) | 4. | \(\dfrac{I_0}{2}\) |
Two polaroids are kept crossed to each other. Now one of them is rotated through an angle of \(45^{\circ}\)
1. \(15\%\)
2. \(25\%\)
3. \(50\%\)
4. \(60\%\)
Unpolarized light of intensity \(32\) Wm–2 passes through three polarizers such that the transmission axes of the first and second polarizer make an angle of \(30^{\circ}\) with each other and the transmission axis of the last polarizer is crossed with that of the first. The intensity of the final emerging light will be:
1. \(32\) Wm–2
2. \(3\) Wm–2
3. \(8\) Wm–2
4. \(4\) Wm–2
| 1. | \(I_0\) | 2. | \(\dfrac{I_0}{2}\) |
| 3. | \(\dfrac{I_0}{4}\) | 4. | \(\dfrac{I_0}{8}\) |
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