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. \(\frac{I_0}{4}\)
2. \(I_0\)
3. \(2I_0\)
4. \(\frac{I_0}{2}\)
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. (I0: Intensity of unpolarized light)
The intensity of light, I,
emerging out of the 5th polaroid is:
1.
2.
3.
4.
Two polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light of intensity Io is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45° with that of P1. The intensity of transmitted light through P2 is:
1.
2.
3.
4.
When an unpolarized light of intensity I0 is incident on a polarizing sheet, the intensity of the light which does not get transmitted is:
1. Zero
2. I0
3.
4.
Two polaroids are kept crossed to each other. Now one of them is rotated through an angle of . The percentage of incident light now transmitted through the system is:
1. 15%
2. 25%
3. 50%
4. 60%
A beam of unpolarized light of intensity is passed first through a tourmaline crystal A and then through another tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of the final emergent light is I. The value of I is:
1.
2.
3.
4.
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° 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
Two polaroids are in the path of an unpolarized beam of intensity such that no light is emitted from the second polaroid. If a third polaroid, whose polarization axis makes an angle 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. \(I_{0}\sin^{2}2\theta \)
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.
2.
3.
4. A/2