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Single frequency- phase and group velocity?

by iVenky
Tags: wave propagation
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iVenky
#1
Feb21-13, 06:10 AM
P: 103
Let's consider a single frequency signal of frequency say 'f'. If the wave is propagating through a medium (EM wave with a velocity of 'c') then what will be the phase and group velocity? I believe that we can't find out the phase velocity and that the group velocity should be equal to the velocity of light 'c'.

Can you tell me a specific example where these phase and group velocities are really useful?

Thanks in advance.
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Simon Bridge
#2
Feb21-13, 07:58 AM
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Can you tell me a specific example where these phase and group velocities are really useful?
You mean in general or in the case of a single frequency in a vacuum?

http://en.wikipedia.org/wiki/Phase_velocity


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