Question

A Sound ware has a wavelength of 0.20m. What is the phase difference between two points along the wave which are 0.85 m apart​

Answer 1

Hope it helps. Thank you

Answer 2

General expression relating PHASE DIFFERENCE AND PATH DIFFERENCE is:

$\boxed{\Delta \phi = \dfrac{2\pi}{ \lambda} \times \Delta d}$

$\implies \Delta \phi = \dfrac{2\pi}{ 0.2} \times 0.85$

$\implies \Delta \phi = \dfrac{2\pi}{ 20} \times 85$

$\implies \Delta \phi = \dfrac{\pi}{ 10} \times 85$

$\implies \Delta \phi = 8.5\pi$

$\implies \Delta \phi = 8.5\pi \: radians$

So, phase difference is 8.5π Radians.