Question

The ratio of intensities of two waves are given by $4:1$. The ratio of the amplitudes of the two waves is

• A. 2 : 1
• B. 1 : 2
• C. 4 : 1
• D. 1 : 4

Answer 1

Answer: (A)

$I\propto a^2\Rightarrow \frac{a_1}{a_2}={\left(\frac{4}{1}\right)}^{1/2}=\frac{2}{1}$