What frequency will produce the shortest wavelength in ultrasound testing?

In ultrasound testing, the wavelength is inversely related to the frequency. This means that as the frequency increases, the wavelength decreases. The formula for wavelength (λ) in relation to frequency (f) and the speed of sound (v) in the medium is given by:

λ = v / f

Where:

• λ = wavelength

• v = speed of sound in the medium (which is typically constant for a given material)

• f = frequency

When considering the frequencies provided, the choice with the highest frequency will yield the shortest wavelength. Among the options presented, 25 MHz is the highest frequency. Consequently, it will produce the shortest wavelength since increasing frequency leads to a smaller wavelength.

This demonstrates the principle that higher frequencies allow for greater resolution in ultrasonic testing, as shorter wavelengths can detect smaller features in the material being tested.