Geometrical OpticsMedium
Question
When a been of light from air enters into the water, the characteristics of light will not be changed, is :
Options
A.frequency
B.speed
C.colour
D.amplitude
Solution
When electromagnetic wave enters into any other medium, its electric component induces dipole in the molecule of the medium. These dipoles have oscllating dipole moment and its time peiod is the same as inducing electric field of incoming wave. These dipole in turn radiates electromagntic wave having same time period. So in this phenomenon, time period of frequency of the wave remains unaltered.
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