FDI Diagnostic Imaging Exam 1 Practice Exam

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The number of waves passing a given point per unit time is defined as what quantity, and which Greek letter represents it?

Frequency; nu

Frequency is the rate at which waves pass a fixed point per unit time, measured in cycles per second (hertz). The Greek letter used to denote frequency is nu. Wavelength, by contrast, is the spatial distance between successive crests and is denoted by lambda. Since the question asks for how many waves pass per unit time, the correct concept is frequency, and its symbol is nu. In wave terminology, speed relates to both via v = f times lambda, tying frequency to other wave properties.

Wavelength; lambda

Frequency; lambda

Wavelength; nu

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