A longitudinal sound wave is represented on a displacement–distance graph

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

Problem

A longitudinal sound wave is represented on a displacement–distance graph. Five successive compressions are located at

x = 0\,\text{cm},\; 4\,\text{cm},\; 8\,\text{cm},\; 12\,\text{cm},\; 16\,\text{cm}

. What is the wavelength of the wave? (a)

8\,\text{cm}

(b)

16\,\text{cm}

(c)

4\,\text{cm}

(d)

2\,\text{cm}