Last Updated On 01-06-2023 - By Jeesha Sara
When a compact disc is illuminated by small source of white light, coloured bands are observed. This is due to
a)
Dispersion
b)
Diffraction
c)
Interference
d)
Reflection
When a compact disc is illuminated by small source of white light, coloured bands are observed. This is due to
a)
Dispersion
b)
Diffraction
c)
Interference
d)
Reflection
Question ID - 150041 :-
When a compact disc is illuminated by small source of white light, coloured bands are observed. This is due to
a)
Dispersion
b)
Diffraction
c)
Interference
d)
Reflection
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When a compact disc is illuminated by small source of white light, coloured bands are observed. This is due to |
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a) |
Dispersion |
b) |
Diffraction |
c) |
Interference |
d) |
Reflection |
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(b) The data which represents the music is stored on the compact disc in the form of very small pits arranged in a tightly wound spiral track in silvery surface. The distance between two neighbouring track is 1.6 micrometre. Which is only several times the wavelength of visible light, this small spacing is responsible for the wonderful colours reflected by a CD which works as a diffraction grating. Hence, diffraction is responsible for coloured bands. |
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None of these |
and 
are the electric and magnetic field vectors of E.M. waves then the direction of propagation of E.M. wave is along the direction of
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