The displacement of a sound wave is given by

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

y = 0.02\sin(4\pi x - 200\pi t)

, where

x

is in metres and

t

in seconds. Find the phase difference between the points at

x = 0.25\,\text{m}

and

x = 1.00\,\text{m}

at the same instant. (a)

1.5\pi\,\text{rad}

(b)

\pi\,\text{rad}

(c)

3\pi\,\text{rad}

(d)

2\pi\,\text{rad}