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Electromagnetic radiation - Spectrum, Wavelengths, Properties: The brief account of familiar phenomena given above surveyed electromagnetic radiation from low frequencies of ν (radio waves) to exceedingly high values of ν (gamma rays). Going from the ν values of radio waves to those of visible light is like comparing the thickness of this page with the distance of Earth from the Sun, which represents an increase by a factor of a million billion. Similarly, going from the ν values of ... Electromagnetic radiation (EMR) is a form of energy that is all around us and takes many forms, such as radio waves, microwaves, X-rays, and gamma rays. Sunlight is also a form of EM energy, but visible light is only a small portion of the EM spectrum, which contains a broad range of electromagnetic wavelengths. Learn what electromagnetic radiation is, how it propagates, and how it interacts with matter. Explore the electromagnetic spectrum, ionizing and non-ionizing radiation, and the history of its discovery. Electromagnetic radiation is a form of energy that includes radio waves, microwaves, X-rays and gamma rays, as well as visible light.
