Select Question Set:
Q. No.The width of the central maximum of the diffraction pattern of a single slit of width \(1~\text{mm}\) equals the width of the slit itself, when the screen is \(1~\text m\) away from it. The wavelength of light used equals:
1.
\(250~\text{nm}\)
2.
\(500~\text{nm}\)
3.
\(1000~\text{nm}\)
4.
\(2000~\text{nm}\)
Subtopic: Diffraction |
68%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Red light is used in a single slit diffraction experiment with a slit width of \(0.6~\text{mm}\). If the red light is replaced by yellow light, then the observed pattern will reveal:
| 1. | that the central maximum is wider. |
| 2. | more number of fringes. |
| 3. | less number of fringes. |
| 4. | no diffraction pattern. |
Subtopic: Diffraction |
50%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In Young's double-slit experiment, a student observes \(8\) fringes in a certain segment of the screen when a monochromatic light of \(600\) nm wavelength is used. If the wavelength of light is changed to \(400\) nm, then the number of fringes he would observe in the same region of the screen is:
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
Subtopic: Young's Double Slit Experiment |
78%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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: Polarization of Light |
69%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A monochromatic light of frequency \(500~\text{THz}\) is incident on the slits of Young's double slit experiment. If the distance between the slits is \(0.2~\text{mm}\) and the screen is placed at a distance \(1~\text{m}\) from the slits, the width of \(10\) fringes will be:
| 1. | \(1.5~\text{mm}\) | 2. | \(15~\text{mm}\) |
| 3. | \(30~\text{mm}\) | 4. | \(3~\text{mm}\) |
Subtopic: Young's Double Slit Experiment |
59%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Given below are two statements:
| Assertion (A): | If the phase difference between the light waves emerging from the slits of Young's experiment is \(\pi\) radian, the central fringe will be dark. |
| Reason (R): | Phase difference is equal to \((2\pi/\lambda)\) times of path difference. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Young's Double Slit Experiment |
57%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Out of the two slits of Young’s double-slit experiment, one of the slits is painted to make its intensity less than that of the other slit. Then:
| 1. | the fringes will disappear (uniform illumination). |
| 2. | screen will become dark. |
| 3. | the contrast between fringes will increase. |
| 4. | the contrast between fringes will decrease. |
Subtopic: Young's Double Slit Experiment |
70%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Two Nicols prisms (polariser and analyser) are oriented in such a way that the maximum amount of light is transmitted. Now, if the analyser is rotated by an angle of \(45^\circ\), what fraction of the maximum intensity of the light will be reduced?
1. \(25\%\)
2. \(75\%\)
3. \(50\%\)
4. \(30\%\)
1. \(25\%\)
2. \(75\%\)
3. \(50\%\)
4. \(30\%\)
Subtopic: Polarization of Light |
61%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In Young’s double slit experiment, the two slits are \(0.6\) mm distance apart. The interference pattern is observed on a screen at a distance of \(80\) cm from the slits. The first dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light will be:
1. \(450\) nm
2. \(550\) nm
3. \(650\) nm
4. \(750\) nm
1. \(450\) nm
2. \(550\) nm
3. \(650\) nm
4. \(750\) nm
Subtopic: Superposition Principle |
79%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
A parallel beam of light of wavelength \(600\) nm falls normally on a slit of width \(a.\) What should the value of \(a\) so that the first-order diffraction minimum occurs at an angle of \(30^\circ\)?
1. \(1.1\times10^{-6}~\text{m}\)
2. \(1.2\times10^{-6}~\text{m}\)
3. \(1.3\times10^{-6}~\text{m}\)
4. \(1.4\times10^{-6}~\text{m}\)
1. \(1.1\times10^{-6}~\text{m}\)
2. \(1.2\times10^{-6}~\text{m}\)
3. \(1.3\times10^{-6}~\text{m}\)
4. \(1.4\times10^{-6}~\text{m}\)
Subtopic: Diffraction |
84%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.