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Question
What are the important points of wave theory of light?
Solution
- Christian Huygens (1678) proposed the wave theory to explain the propagation of light through a medium.
- According to him, light is a disturbance from a source travels that as longitudinal mechanical waves through the ether medium (that was presumed to pervade all space) as mechanical wave requires a medium for its propagation.
- The wave theory could successfully explain phenomena of reflection, refraction, interference and diffraction of light.
- Later, the existence of ether in all space was proved to be wrong. Hence, this theory could not explain the propagation of light through a vacuum.
- The phenomenon of polarisation could not be explained by this theory as it is the property of only transverse waves.
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