How is wavelength defined?

Wavelength is defined as the distance between two corresponding points on a wave, such as the distance between two successive crests or troughs. This measurement is crucial in understanding wave properties because it directly influences the wave's frequency and energy. In essence, the wavelength determines how compact or spread out the wave oscillations are in space. Recognizing this concept helps in comprehending various applications of waves, including sound and light, where different wavelengths result in different characteristics such as pitch and color.

Considering other definitions: the maximum height of the wave and the lowest point of the wave pertain to amplitude, which describes the wave's energy but not its wavelength. The height of the wave, while related to these aspects, does not provide information about the distance between wave points, which is the essence of wavelength.