What is meant by "wavelength" in the context of light?

In the context of light, "wavelength" is defined as the distance between successive crests of a wave. This measurement is critical in understanding the characteristics of light waves, including how they behave and interact with various materials. Wavelength is typically measured in nanometers (nm) for visible light and can influence both the color perceived by the human eye and how light is absorbed or emitted by substances.

Different wavelengths correspond to different types of electromagnetic radiation, with visible light occupying a small range of wavelengths in the electromagnetic spectrum. Therefore, knowledge of wavelength allows for insights into radiant energy properties and their applications in technologies such as lasers, fiber optics, and photodetectors.

Other aspects mentioned, such as the speed of light, energy of a light wave, or color perception have their own significance but do not define what wavelength specifically is. Wavelength directly relates to the spatial measurement of the wave, making it fundamental to the understanding of light and its various interactions.