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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%

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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. $\sqrt{7}$

4. 6.5

Subtopic: Superposition Principle |

85%

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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 |

85%

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Two sources with intensity I_{o} and 4I_{o} respectively interfere at a point in a medium. The maximum and the minimum possible intensity respectively would be:

1. 2I_{o}, I_{o}

2. 9I_{o}, 2I_{o}

3. 4I_{o}, I_{o}

4. 9I_{o}, I_{o}

Subtopic: Superposition Principle |

84%

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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 $\frac{3\mathrm{\pi}}{2}$ and 2$\mathrm{\pi}$ 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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