Single frequency- phase and group velocity?


by iVenky
Tags: wave propagation
iVenky
iVenky is offline
#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.
Phys.Org News Partner Physics news on Phys.org
Beam on target: CEBAF accelerator achieves 12 GeV commissioning milestone
Modification of structural composite materials to create tailored lenses
High power laser sources at exotic wavelengths
Simon Bridge
Simon Bridge is offline
#2
Feb21-13, 07:58 AM
Homework
Sci Advisor
HW Helper
Thanks ∞
PF Gold
Simon Bridge's Avatar
P: 10,913
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


Register to reply

Related Discussions
Measure Phase velocity/group velocity of EM-wave Classical Physics 3
EM Group velocity & phase velocity in dispersive medium Classical Physics 5
wave phase velocity vs. group velocity? General Physics 0
Group velocity of single wave? Advanced Physics Homework 3
Relation between Group velocity and Phase velocity Classical Physics 3