Phase velocity/propagation velocity?

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The discussion clarifies the difference between phase velocity and propagation velocity in the context of transmission lines. The user is trying to determine which type of velocity to use when solving a problem involving time delay and length. The equation lambda = vp * T is identified as relating to the velocity of propagation. Additionally, the relationship c = f * lambda is noted, typically applying to free space scenarios. Understanding these distinctions is crucial for accurately solving transmission line problems.
seang
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what is the difference between the two, if any?

In particular, I'm working on this transmission line problem where I'm given the time delay and the length. I can solve to find some sort of velocity--is it the phase velocity, or propagation velocity?

I also have the equation lambda = vp * T. Again, is this phase velocity or propagation velocity?

Thanks,
Sean
 
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Sounds like Velocity of Propagation...not sure though.

Lambda = v*T = v/f

where,

v = velocity of propagation
T = period
f = frequency

Also, remember that c = f*lambda for free space (which is normally assumed for some applications).
 

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