JEE Advanced 2023 Paper 2 Solutions

Paragraph for next two questions$S_1$ and $S_2$ are two identical sound sources of frequency $656\,\mathrm{Hz}$. The source $S_1$ is located at $O$ and $S_2$ moves anticlockwise with a uniform speed $4\sqrt{2}\,\mathrm{ms}^{-1}$ on a circular path around $O$, as shown in the figure. There are three points $P, Q$ and $R$ on this path such that $P$ and $R$ are diametrically opposite while $Q$ is equidistant from them. A sound detector is placed at point $P$. The source $S_1$ can move along direction $O P$.[Given: The speed of sound in air is $324\,\mathrm{m}\,\mathrm{s}^{-1}$ ]