Question

The distance between two consecutive points with phase difference of $60^{\circ}$ in a wave of frequency $500 \,Hz$ is $60\, m$ The velocity with which wave is traveling is ___$km / s$

Answer 1

The correct answer is 18.
Δϕ=λ2π​Δx
3π​=λ2π​(6m)
⇒λ=36m
V=fλ=(500Hz)(36m)
=18000m/s=18km/s