- 1(current)
Q. No.A beam of unpolarised light of intensity \(I_0\) is passed through a polaroid \(A,\) through another polaroid \(B,\) oriented at \(60^\circ\) and finally through another polaroid \(C,\) oriented at \(45^\circ\) relative to \(B\) as shown in the figure. The intensity of the emergent light is:
| 1. | \(\dfrac{{I}_0}{16}\) | 2. | \(\dfrac{{I}_0}4\) |
| 3. | \(\dfrac{{I}_0}2\) | 4. | \(\dfrac{{I}_0}{32}\) |
Subtopic: Â Polarization of Light |
 78%
Level 2: 60%+
NEET - 2024
Hints
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. \(90^\circ\)
1. \(0^\circ\)
2. \(30^\circ\)
3. \(60^\circ\)
4. \(90^\circ\)
Subtopic: Â Polarization of Light |
 50%
Level 3: 35%-60%
NEET - 2024
Hints
An unpolarised light beam strikes a glass surface at Brewster's angle. Then:
| 1. | The refracted light will be completely polarised. |
| 2. | Both the reflected and refracted light will be completely polarised. |
| 3. | The reflected light will be completely polarised but the refracted light will be partially polarised. |
| 4. | The reflected light will be partially polarised. |
Subtopic: Â Polarization of Light |
 69%
Level 2: 60%+
NEET - 2024
Hints
After passing through a polarizer, a linearly polarized light of intensity \(I\) is incident on an analyser making an angle of \(30^\circ\) with the axes of the polariser. The intensity of light emitted from the analyser will be:
| 1. | \(\dfrac{I}{2}\) | 2. | \(\dfrac{I}{3}\) |
| 3. | \(\dfrac{3I}{4}\) | 4. | \(\dfrac{2I}{3}\) |
Subtopic: Â Polarization of Light |
 83%
Level 1: 80%+
NEET - 2022
Hints
A linearly polarized monochromatic light of intensity \(10\) lumen is incident on a polarizer. The angle between the direction of polarization of the light and that of the polarizer such that the intensity of output light is \(2.5\) lumen is:
| 1. | \(60^\circ\) | 2. | \(75^\circ\) |
| 3. | \(30^\circ\) | 4. | \(45^\circ\) |
Subtopic: Â Polarization of Light |
 69%
Level 2: 60%+
NEET - 2022
Hints
The Brewster's angle for an interface should be:
1. \(30^{\circ}<i_b<45^{\circ}\)
2. \(45^{\circ}<i_b<90^{\circ}\)
3. \(i_b=90^{\circ}\)
4. \(0^{\circ}<i_b<30^{\circ}\)
Subtopic: Â Polarization of Light |
 76%
Level 2: 60%+
NEET - 2020
Hints
Unpolarised light is incident from the air on a plane surface of a material of refractive index \(\mu.\) At a particular angle of incidence \(i ,\) it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
| 1. | the reflected light is polarised with its electric vector parallel to the plane of incidence. |
| 2. | the reflected light is polarised with its electric vector perpendicular to the plane of incidence. |
| 3. | \(i = \text{sin}^{-1}\dfrac{1}{\mu}\) |
| 4. | \(i = \text{tan}^{-1}\dfrac{1}{\mu}\) |
Subtopic: Â Polarization of Light |
 64%
Level 2: 60%+
NEET - 2018
Hints
Two polaroids \(P_1\) and \(P_2\) are placed with their axis perpendicular to each other. Unpolarised light of intensity \(I_0\) is incident on \(P_1\). A third polaroid \(P_3\) is kept in between \(P_1\) and \(P_2\) such that its axis makes an angle \(45^\circ\) with that of \(P_1\). The intensity of transmitted light through \(P_2\) is:
1. \(\dfrac{I_0}{4}\)
2. \(\dfrac{I_0}{8}\)
3. \(\dfrac{I_0}{16}\)
4. \(\dfrac{I_0}{2}\)
Subtopic: Â Polarization of Light |
 70%
Level 2: 60%+
NEET - 2017
Hints
- 1(current)
Q. No.
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