What does wavelength represent in the speed of light equation?

Wavelength is defined as the distance between successive crests of a wave. In the context of the speed of light equation, which is usually represented as ( c = \lambda \nu ) (where ( c ) is the speed of light, ( \lambda ) is the wavelength, and ( \nu ) is the frequency), understanding wavelength is crucial.

Wavelength plays a significant role in determining the energy and frequency of electromagnetic waves. The longer the wavelength, the lower the frequency, and vice versa. This relationship is fundamental in many areas of physics, especially in understanding how different types of light interact with matter.

The other options describe different properties of waves but do not pertain to wavelength. The frequency of the light wave relates to how many crests pass a point in a given time, the height of the wave's crest corresponds to the amplitude which indicates the energy of the wave, and the amplitude itself is a measure of how high the wave rises from its equilibrium position, not its wavelength. Thus, recognizing that the distance between successive crests defines the wavelength is key to understanding the wave properties of light.