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 wavefronts.

Subtopic:  Huygens' Principle |
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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 |
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Huygen's principle for secondary wavelets may be used to:

1.  explain Snell's law.

2.  find the velocity of light in vacuum.

3.  find a new position of a wavefront.

4.  both (1) & (3) are correct.

Subtopic:  Huygens' Principle |
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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 |
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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 |
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Light travels faster in air than in glass. This is in accordance with:

1. the wave theory of light.
2. the corpuscular theory of light.
3. Neither (1) nor (2)
4. Both (1) and (2)
Subtopic:  Huygens' Principle |
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The plane wavefront is incident on a spherical mirror as shown. The reflected wavefront will be:
                   

1.                   2.  
3.                 4.  

Subtopic:  Huygens' Principle |
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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 |
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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 |
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If the ratio of amplitudes of two coherent sources producing an interference pattern is 3 : 4, the ratio of intensities at maxima and minima is

1.  3 : 4

2.  9 : 16

3.  49 : 1

4.  25 : 7

Subtopic:  Superposition Principle |
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