To determine the frequency of a wave you must measure by counting the number of high points of waves that pass the fixed point in 1 second or some other time period.
What is the frequency of the waveform?
Wave frequency is the number of waves that pass a fixed point at a particular time. The SI unit of wave frequency is hertz (Hz). Here, 1 hertz corresponds to a wave passing through a fixed point every second. High frequencies have more energy than low frequencies of the same amplitude.
The relationship between wavelength and frequency is called the reciprocal because the higher the frequency, the shorter the wavelength.
In addition to the defined speed, each wave has a frequency. This is the number of wavelengths that pass a point per second. Frequency is measured in Hertz (wavenumber per second).
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