The frequency of the ultrasound is (converting in Hz)
[tex]f=4.077 MHz=4.077 \cdot 10^6 Hz[/tex]
while the speed of sound in the body is
[tex]v=2.31 km/s = 2310 m/s[/tex]
We can calculate the wavelength of the ultrasound in the body by using the relationship betwen frequency, wavelength and speed of the wave:
[tex]\lambda = \frac{v}{f}= \frac{2310 m/s}{4.077 \cdot 10^6 Hz}=5.67 \cdot 10^{-4} m [/tex]
