What defines wavelength in the context of electromagnetic energy?

Wavelength in the context of electromagnetic energy is defined as the distance between the crests of two consecutive waves. This measurement is fundamental in understanding various properties of electromagnetic radiation, as different wavelengths correspond to different types of electromagnetic radiation, such as visible light, radio waves, and X-rays.

Wavelength is typically measured in meters and can be used to determine the frequency of the wave, as there is an inverse relationship between wavelength and frequency. This relationship is expressed by the equation ( c = \lambda f ), where ( c ) is the speed of light, ( \lambda ) is wavelength, and ( f ) is frequency. Therefore, the correct identification of wavelength as the distance between wave crests directly relates to the behavior and categorization of electromagnetic radiation, making it a fundamental characteristic in the study of light and other forms of electromagnetic energy.