Light is:

1. a wave phenomenon
2. a particle phenomenon
3. both particle and wave phenomenon
4. none of the above
Subtopic:  Diffraction |
 91%
From NCERT
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Which of the following properties show that light is a transverse wave?
1. reflection
2. interference
3. diffraction
4. polarization

Subtopic:  Polarization of Light |
 69%
From NCERT
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When light is refracted into a medium then,
1. its wavelength and frequency both increase.
2. its wavelength increases but frequency remains unchanged.
3. its wavelength decreases but frequency remains unchanged.
4. its wavelength and frequency both decrease.

Subtopic:  Huygens' Principle |
 76%
From NCERT
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When light is refracted, which of the following does not change?
1. wavelength
2. frequency
3. velocity
4. amplitude

Subtopic:  Huygens' Principle |
 91%
From NCERT
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The amplitude modulated (AM) radio wave bends appreciably round the corners of a 1m × 1m board but the frequency modulated (FM) wave only negligibly bends. If the average wavelengths of AM and FM waves are \(\lambda_a\) and \(\lambda_f\),

1. \(\lambda_a\) > \(\lambda_f\)

2. \(\lambda_a\) = \(\lambda_f\)

3. \(\lambda_a\) < \(\lambda_f\)

4. we don't have sufficient information to decide about the relation of \(\lambda_a\) and \(\lambda_f\)

Subtopic:  Diffraction |
 55%
From NCERT
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Which of the following sources gives the best monochromatic light?
1. a candle
2. a bulb
3. a mercury tube
4. a laser

Subtopic:  Young's Double Slit Experiment |
 78%
From NCERT
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The wavefronts of a light wave travelling in vacuum are given by \(x+y+z=c\). The angle made by the direction of propagation of light with the X-axis is:
1. \(0^{\circ}\)
2. \(45^{\circ}\)
3. \(90^{\circ}\)
4. \(\mathrm{cos^{-1}\left(\dfrac{1}{\sqrt{3}}\right )}\)

Subtopic:  Huygens' Principle |
From NCERT
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The wavefronts of light coming from a distant source of unknown shape are nearly:
1. plane
2. elliptical
3. cylindrical
4. spherical

Subtopic:  Huygens' Principle |
 67%
From NCERT
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The inverse square law of intensity (i.e., the intensity \(\propto \dfrac{1}{r^2})\) is valid for:
1. a point source
2. a line source
3. a plane source
4. a cylindrical source

Subtopic:  Huygens' Principle |
 86%
From NCERT
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Two sources are called coherent if they produce waves:

1. of equal wavelength
2. of equal velocity
3. having same shape of wavefront
4. having a constant phase difference

Subtopic:  Young's Double Slit Experiment |
 85%
From NCERT
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