Light is:

1. a wave phenomenon
2. a particle phenomenon
3. both particle and wave phenomenon
4. none of the above
Subtopic:  Diffraction |
 89%
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,

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 |
 75%
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 |
 56%
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. \(\mathrm{cos^{-1}\left(\frac{1}{\sqrt{3}}\right )}\)

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 |
 66%
From NCERT
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The inverse square law of intensity (i.e., the intensity \(\propto \frac{1}{r^2}\)) is valid for:
1. a point source
2. a line source
3. a plane source
4. a cylindrical source

Subtopic:  Huygens' Principle |
 85%
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 |
 84%
From NCERT
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