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What is light? Light is an electromagnetic wave. The light that most people consider actual 'light' is really only a small amount of the Electromagnetic Spectrum. That small part is labeled Visible Light. The other electromagnetic waves in the spectrum include (in order) Radio Waves, Infrared, Visble Light, Ultraviolet, X-Rays, and Gamma Rays. The lower you are on the spectrum, the less energy and frequency the waves contain. The higher you are on the spectrum, the higher energy and frequency the waves contain. Radio Waves, at the begining of the spectrum, are red to orange with a large wavelength and low frequency and wavelength. Radio Waves aren't very strong and are only used for things like telephones. On the other side of the spectrum are Gamma Rays, which are indigo to violet with a lot of energy and freqency and a short wavelength. Gamma Rays are strong enough to kill cancer and are part of the chemotheraphy process. To put it simply, light is energy in the form of an electromagnetic wave that can travel through any medium, even a vaccuum. |
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