Question

A wave has a length of 2m and a frequency of 10Hz. Calculate the wave number . Calculate the angular frequency. Calculate wave speed

Answer 1

Answer:-

wave length ($\lambda=$ 2 m)

Frequency = 10Hz)

a) wave number = $1\over {\lambda}$ $={1\over{2m}}=0.5m^{-1}$

b)angular frequency $=2\pi f=2×3.14×2=12.56 Hz$

c)wave speed = $v=f\lambda = 10Hz×2m=20m/s$

As frequency is no. Of waves per second