UT Testing-Section 2 Physics of Ultrasound

The applet below shows a longitudinal and transverse wave. The direction of
wave propagation is from left to right and the movement of the lines indicate
the direction of particle oscillation. The equation relating ultrasonic
wavelength, frequency, and propagation velocity is included at the bottom of
the applet in a reorganized form. The values for the wavelength, frequency,
and wave velocity can be adjusted in the dialog boxes to see their effects on
the wave. Note that the frequency value must be kept between 0.1 to 1 MHz
(one million cycles per second) and the wave velocity must be between 0.1
and 0.7 cm/us.