Question

The ultrasound waves have a much greater penetrating power than ordinary sound because they have very high

• A. Amplitude
• B. Frequency
• C. Wave length
• D. Speed

Answer 1

The correct option is B Frequency

The frequency $f$ is related with intensity $I$ of wave by ,

$I\propto f^2$ ,

and intensity is related with energy $E$ by ,

$E\propto I$ ,

therefore due to high frequency ultrasound has a greater energy than ordinary sound wave , hence greater penetrating power because penetrating power depends upon energy of the wave .