Q. No.In Young's double-slit experiment, using monochromatic light of wavelength \(\lambda,\) the intensity of light at a point on the screen where the path difference is \(\lambda,\) is \(K\) units. The intensity of light at a point where the path difference is \(\dfrac{\lambda}{3}\) will be:
1. \(\dfrac{K}{4}\)
2. \(K\)
3. \(\dfrac{K}{2}\)
4. \(2K\)
1. \(\dfrac{K}{4}\)
2. \(K\)
3. \(\dfrac{K}{2}\)
4. \(2K\)
Subtopic: Â Young's Double Slit Experiment |
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Level 3: 35%-60%
NEET - 2026
Please attempt this question first.
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Please attempt this question first.
If the monochromatic source in Young's double slit experiment is replaced by white light, then:
| 1. | there will be a central dark fringe surrounded by a few coloured fringes. |
| 2. | there will be a central bright white fringe surrounded by a few coloured fringes. |
| 3. | all bright fringes will be of equal width. |
| 4. | interference pattern will disappear. |
Subtopic: Â Young's Double Slit Experiment |
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Level 2: 60%+
NEET - 2024
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In Young's double slit experiment, if the wavelength of light used is increased (say from violet to red) then the:
| 1. | fringe width decreases. |
| 2. | fringe width increases. |
| 3. | central bright fringe becomes dark. |
| 4. | fringe width remains unaltered. |
Subtopic: Â Young's Double Slit Experiment |
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Level 1: 80%+
NEET - 2024
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Two slits in Young's double-slit experiment are \(1.5~\text{mm}\) apart, and the screen is placed at a distance of \(1 ~\text m\) from the slits. If the wavelength of the light used is \(600\times10^{-9}~\text {m}\) then the fringe separation is:
1. \(4\times10^{-5}~\text m\)
2. \(9\times10^{-8}~\text m\)
3. \(4\times10^{-7}~\text m\)
4. \(4\times10^{-4}~\text m\)
1. \(4\times10^{-5}~\text m\)
2. \(9\times10^{-8}~\text m\)
3. \(4\times10^{-7}~\text m\)
4. \(4\times10^{-4}~\text m\)
Subtopic: Â Young's Double Slit Experiment |
 77%
Level 2: 60%+
NEET - 2024
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For Young's double-slit experiment, two statements are given below:
| Statement I: | If screen is moved away from the plane of slits, angular separation of the fringes remains constant. |
| Statement Ii: | If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases. |
| 1. | Statement I is False but Statement II is True. |
| 2. | Both Statement I and Statement II are True. |
| 3. | Both Statement I and Statement II are False. |
| 4. | Statement I is True but Statement II is False. |
Subtopic: Â Young's Double Slit Experiment |
Level 3: 35%-60%
NEET - 2023
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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: Â Young's Double Slit Experiment |
 77%
Level 2: 60%+
NEET - 2022
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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: Â Young's Double Slit Experiment |
 60%
Level 2: 60%+
NEET - 2022
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If the screen is moved away from the plane of the slits in Young's double slit experiment, then the:
| 1. | angular separation of the fringes increases. |
| 2. | angular separation of the fringes decreases. |
| 3. | linear separation of the fringes increases. |
| 4. | linear separation of the fringes decreases. |
Subtopic: Â Young's Double Slit Experiment |
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Level 2: 60%+
NEET - 2022
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In Young's double-slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
1. half
2. four times
3. one-fourth
4. double
1. half
2. four times
3. one-fourth
4. double
Subtopic: Â Young's Double Slit Experiment |
 83%
Level 1: 80%+
NEET - 2020
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In a double-slit experiment, when the light of wavelength \(400~\text{nm}\) was used, the angular width of the first minima formed on a screen placed \(1~\text{m}\) away, was found to be \(0.2^{\circ}.\) What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water? \(\left(\mu_{\text{water}} = \dfrac{4}{3}\right)\)
1. \(0.1^{\circ}\)
2. \(0.266^{\circ}\)
3. \(0.15^{\circ}\)
4. \(0.05^{\circ}\)
Subtopic: Â Young's Double Slit Experiment |
 78%
Level 2: 60%+
NEET - 2019
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