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 |
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 |
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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 |
71%
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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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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 |
63%
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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 |
57%
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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 |
51%
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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 $\frac{{\mathrm{I}}_{\mathrm{max}}}{{\mathrm{I}}_{\mathrm{min}}}$ will be:

1. 1
2. 9
3. 4
​​​​​​​4. 16

Subtopic:  Superposition Principle |
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