Physics

Problem

Sound waves with amplitudes

A_1=4

units and

A_2=3

units arrive at a point with a phase difference of

120^{\circ}

. What is the ratio of the resultant intensity

I

at that point to the maximum possible intensity

I_{\max}

that could be obtained from these two waves? a)

\dfrac{25}{49}

\dfrac{37}{49}

\dfrac{13}{49}

\dfrac{13}{25}