What happens to wavelength as frequency increases?

As frequency increases, the wavelength decreases. This relationship is defined by the wave equation, which states that the speed of a wave is equal to its frequency multiplied by its wavelength (v = f × λ). In this equation, when the speed (v) of the wave is constant, any increase in frequency (f) must be accompanied by a corresponding decrease in wavelength (λ) to maintain the equality.

For sound and ultrasound, which are used in sonography, this principle is particularly important. Higher frequency waves provide better resolution in imaging but have shorter wavelengths that can affect their penetration in tissue. Understanding this relationship helps sonographers select appropriate frequencies for various imaging purposes, balancing resolution and penetration based on the clinical scenario.