When a stationary wave is formed, then its frequency is

When a stationary wave is formed, then its frequency is
  1. same as that of the individual waves
  2. twice that of the individual waves
  3. half that of the individual waves
  4. None of the above

Solution

If $y_{\text{incident}} = a \sin(\omega t - kx)$ and $y_{\text{stationary}} = a \sin(\omega t) \cos kx$ Frequencies of both incident and stationary waves are same, i.e. $\omega$.

Practice more Waves and Sound questions on Aicharya