Huygens' wave theory allows us to know the:

1. Wavelength of the wave.
2. Velocity of the wave.
3. Amplitude of the wave.
4. Propagation of wavefront.

Subtopic:  Huygens' Principle |
 84%
From NCERT
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When the light diverges from a point source, the shape of the wavefront is:

1. Parabolic.

2. Plane.

3. Spherical.

4. Elliptical.

Subtopic:  Huygens' Principle |
 83%
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By Huygen's wave theory of light, we cannot explain the phenomenon of:

1. Interference
2. Diffraction
3. Photoelectric effect
4. Polarisation

Subtopic:  Huygens' Principle |
 73%
From NCERT
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Which of the following is not true?

1. The speed of light is dependent on the colour of the light.
2. The speed of violet light is less than the speed of the red light in glass.
3. The frequency of light never depends upon the property of the medium.
4. When the light diverges from a point source, the shape of the wavefront is plane.
Subtopic:  Huygens' Principle |
 72%
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On superposition of two waves \(y_{1}=3sin\left ( \omega t-kx \right )\) and \(y_{2}=4sin\left ( \omega t-kx+\frac{\pi }{2} \right )\) at a point, the amplitude of the resulting wave will be:

1.  7

2.  5

3.  7

4.  6.5

Subtopic:  Superposition Principle |
 85%
From NCERT
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Two superposing waves are represented by the following equations: 
\({\mathrm{y}_1=5 \sin 2 \pi(10 \mathrm{t}-0.1 \mathrm{x}), \mathrm{y}_2=10 \sin 2 \pi(10 \mathrm{t}-0.1 \mathrm{x}).}\)
Ratio of intensities ImaxImin will be:

1. 1
2. 9
3. 4
​​​​​​​4. 16

Subtopic:  Superposition Principle |
 85%
From NCERT
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Next Hint
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Two sources with intensity Io and 4Io respectively interfere at a point in a medium. The maximum and the minimum possible intensity respectively would be:
1. 2Io, Io
2. 9Io, 2Io
3. 4Io, Io
4. 9Io, Io

Subtopic:  Superposition Principle |
 84%
From NCERT
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Two light sources are said to be coherent when their:

1. amplitudes are equal and have a constant phase difference.
2. wavelengths are equal.
3. intensities are equal.
4. frequencies are equal and have a constant phase difference.
Subtopic:  Superposition Principle |
 75%
From NCERT
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In Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is λ is K, (λ being the wavelength of light used). The intensity at a point where the path difference is λ/4 will be:

1. K

2. K/4

3. K/2

4. Zero

Subtopic:  Superposition Principle |
 62%
From NCERT
AIPMT - 2014
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Light waves of intensities \(I\) and \(9I\) interfere to produce a fringe pattern on a screen. The phase difference between the waves at point P is 3π2 and 2π at other point Q. The ratio of intensities at P and Q is:

1.  8: 5

2.  5: 8

3.  1: 4

4.  9: 1

Subtopic:  Superposition Principle |
 60%
From NCERT
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