Wave Length
The wavelength is the distance over which a sound wave repeats. It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings. Wavelength is commonly designated by the Greek letter lambda (λ).
Amplitude
Amplitude is the intensity of a change in an Oscillating Variable. For example, Sound waves in the air are oscillating in atmospheric pressure and their Amplitudes are directly proportionate to the change in pressure.
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