Wave Theory Of Light (Huygens Wave
Theory )
(Proposed by Christian Huygens in 1678)
According to this theory,
- 1) Light
travels in the form of longitudinal waves with uniform velocity.
- 2) Different
colours due to different wavelength of waves.
- 3) When
light waves enters in eyes we get the sensation of light.
- 4) A
material medium is necessary for the propagation of light.
- 5) To
explain the propagation of light waves through the vacuum, Huygens suggested
the existence of the hypothetical medium called “Luminiferous Ether”.
Obtained
Success:-
- 1) It could explain the laws of reflection, refraction, interference, diffraction, etc.
- 2) This theory predicted that the speed of light in an optically denser medium is less than that in an optically rare medium.
1)
It could not
explain,
a)
Rectilinear
propagation of light.
b)
Polarisation
of light
c)
Compton effect
d)
Photoelectric
effect
2)
By the
experiment done by Michelson and Morley proved that the presence of ether in
vacuum does not exists.
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