Sound of frequency travels through air

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

Sound of frequency

500\,\text{Hz}

travels through air. At a fixed position, how much time must elapse for the phase of the air particle to change by

\pi/3

rad? (a)

0.50\,\text{ms}

(b)

0.17\,\text{ms}

(c)

0.33\,\text{ms}

(d)

0.67\,\text{ms}