With:(adsbygoogle = window.adsbygoogle || []).push({});

wavelength = 4 meters

frequency = 30 cycles/sec

period, T, = .033 sec/cycle

wave propagation velocity = 120 m/s

wave number ,k, = 2pi/wavelength = 1.57 radians/meter

angular frequency, w, = 2pi/T = 188.5 radians/sec

phase velocity = w/k = 120m/s

In the above propagation velocity equals phase velocity

Question: what values here would vary so that phase velocity is greater than propagation velocity ?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Phase velocity greater than propagation velocity

**Physics Forums | Science Articles, Homework Help, Discussion**