ESS227
Prof. Jin-Yi Yu
•Some types of waves, such as acoustic waves, have phase speeds that are independent of the wave number.
•In such nondispersive
waves a spatially localized disturbance
consisting of a number of Fourier
wave components (a wave group) will preserve its shape as it propagates in
space at the phase
speed of the wave.
time=0
sometime
later
Non-Dispersive
Waves