Question

An ultrasonic transducer used for medical diagnosis oscillates at a frequency of 6.7MHz=6.7×10⁶Hz. How much time does each oscillation take and what is the angular frequency of the oscillation

Answer 1

The period of oscillation

$$T=\frac{1}{f}=\frac{1}{6.7*10^{8}\:\rm Hz}=1.5*10^{-9}\:\rm s$$

The angular frequency of the oscillation

$$\omega=2\pi f=2\pi*6.7*10^8=4.2*10^9\:\rm rad/s$$