Definition of Electromagnetic Spectrum
The electromagnetic spectrum is the range that includes all kinds of electromagnetic radiations. Radiation is defined as an energy that is a part of our environment and it travels in the form of waves as well as particles and it has a tendency to spread out as it goes. EM rays are denoted in terms of energy, wavelength, or frequency.
The units for energy, wavelength, and frequency are electron volts, meters, and hertz respectively. The spectrum is composed of gamma rays, x-rays, ultraviolet light, infrared light, microwaves, visible light, and radio waves. EM radiations are described in the terms of photons which travel with the speed of light and are mass-less particles.