Question

group velocity &phase velochity​

Answer 1

$\huge{\underline{\underline{\mathfrak{Answer}}}}$

➡️If ω is directly proportional to k, then the group velocity is exactly equal to the phase velocity. A wave of any shape will travel undistorted at this velocity. If ω is a linear function of k, but not directly proportional (ω = ak + b), then the group velocity and phase velocity are different.

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