Question

Beats are produced with the help of two sound waves on amplitude 3 and 5 units. The ratio of maximum to minimum intensity in the beats is

• A. 2 : 1
• B. 5 : 3
• C. 4 : 1
• D. 16 : 1

Answer 1

Answer: (D)

16 : 1

Answer 2

$\frac{I_{\max}}{I_{\min} = \left( \frac{A_{1} + A_{2}}{A_{1} - A_{2}} \right)^{2}}$= $\left( \frac{5 + 3}{5 - 3} \right)^{2}$= 16:1