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 |
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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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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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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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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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Given below are two statements: 
Assertion (A): Corpuscular theory fails in explaining the velocities of light in air and water.
Reason (R): According to corpuscular theory, light should travel faster in denser media than in rarer media.
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. (A) is False but (R) is True.
Subtopic:  Huygens' Principle |
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Light travels faster in the 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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Sound waves travel faster in water than in air. Imagine a plane sound wavefront incident at an angle \(\alpha\) at the air-water interface; the refracted wavefront making an angle \(\beta\) with the interface. Then,
1. \(\alpha>\beta\)
2. \(\beta>\alpha\)
3. \(\alpha=\beta\)
4. the relation between \(\alpha~\&~\beta \) cannot be predicted.
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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Two superposing waves are represented by the following equations: 
\(y_1=5 \sin 2 \pi(10{t}-0.1 {x}), {y}_2=10 \sin 2 \pi(10{t}-0.1 {x}).\)
Ratio of intensities \(\frac{I_{max}}{I_{min}}\) will be:
1. \(1\)
2. \(9\)
3. \(4\)
4. \(16\)

Subtopic:  Superposition Principle |
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