Question

The ratio of the intensities of two waves is 16 : 9. The ratio of their amplitudes is

• A. 4:03
• B. 3:04
• C. I : 2
• D. 2 : l

Answer 1

Answer: (A)

4:03

Answer 2

Let $a_1$ and $a_2$ be the amplitudes of the waves and intensities $I_1$ and $I_2$, then
$\frac{I_1}{I_2} = \frac{a_1^2}{a_2^2} = \frac{16}{9}$
$\therefore \frac{a_1}{a_2} = \frac{4}{3}$