A sinusoidal wave of frequency travels along string X at and then enters string Y

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

Problem

A sinusoidal wave of frequency

120\,\text{Hz}

travels along string X at

160\,\text{m/s}

and then enters string Y, where its speed is

240\,\text{m/s}

. What is the wavelength of the wave while it is in string Y? (a)

0.67\,\text{m}

(b)

3.3\,\text{m}

(c)

2.0\,\text{m}

(d)

1.3\,\text{m}