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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