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.

In the light of the above statements, choose the correct answer from the options given below:
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:  Young's Double Slit Experiment |
From NCERT
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. \(9\)
Subtopic:  Young's Double Slit Experiment |
 74%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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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 |
 64%
From NCERT
NEET - 2022
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A monochromatic light of frequency \(500\) THz is incident on the slits of a Young's double slit experiment. If the distance between the slits is \(0.2\) mm and the screen is placed at a distance \(1\) m from the slits, the width of \(10\) fringes will be:
1. \(1.5\) mm
2. \(15\) mm
3. \(30\) mm
4. \(3\) mm

Subtopic:  Young's Double Slit Experiment |
 56%
From NCERT
NEET - 2022
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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. \(\frac{I}{2}\) 2. \(\frac{I}{3}\)
3. \(\frac{3I}{4}\) 4. \(\frac{2I}{3}\)
Subtopic:  Polarization of Light |
 77%
From NCERT
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:  Young's Double Slit Experiment |
 59%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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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

Subtopic:  Young's Double Slit Experiment |
 80%
From NCERT
NEET - 2020
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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:  Polarization of Light |
 72%
From NCERT
NEET - 2020
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Two coherent sources of light interfere and produce fringe patterns on a screen. For the central maximum, the phase difference between the two waves will be: 
1. zero 
2. \(\pi\)
3. \(\frac{3\pi}{2}\)
4. \(\frac{\pi}{2}\)

Subtopic:  Superposition Principle |
 72%
From NCERT
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? \(\mu_{\text{water}} = \frac{4}{3}\)
1. \(0.1^{\circ}\)
2. \(0.266^{\circ}\)
3. \(0.15^{\circ}\)
4. \(0.05^{\circ}\)

Subtopic:  Young's Double Slit Experiment |
 74%
From NCERT
NEET - 2019
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