The fundamental parameter in remote sensing. Light has a wavelength and frequency. Visible light is just a small range of wavelengths and corresponding frequencies from the electromagnetic spectrum. Go to this site for more information. A Wave Phenomenon.
Electromagnetic radiation travels as a transverse wave.
The basic parts of any wave include the wavelength, frequency, amplitude, wave speed. See the following site for information about the wave nature of electromagnetic radiation. Electromagnetic Radiation And Energy. Electromagnetic waves carry energy through space and time. The energy of the wave is directly related to its frequency.