A sinusoidal wave travels along a wire with speed and frequency

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

Problem

A sinusoidal wave travels along a wire with speed

320\,\text{m\,s}^{-1}

and frequency

40\,\text{Hz}

. What is the phase difference between two points that are

2.0\,\text{m}

apart along the wire? (a)

\pi

(b)

\dfrac{\pi}{4}

(c)

\dfrac{\pi}{2}

(d)

\dfrac{3\pi}{2}