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BookmarkThe electromagnetic spectrum is the range of all possible electromagnetic radiation.
Above infrared in frequency comes visible light.
This is the range in which the sun and stars similar to it emit most of their radiation.
Nearly all objects in the universe emit, reflect and/or transmit some light.
(One hypothetical exception may be dark matter.) The distribution of this light along the electromagnetic spectrum (called the spectrum of the object) is determined by the object's composition..
For more information about the topic Electromagnetic spectrum, read the full article at Wikipedia.org, or see the following related articles:
Electromagnetic radiation — Electromagnetic radiation is a propagating wave in space with electric and magnetic components. These components oscillate at right angles to each ... > read more
Radiant energy — Radiant energy is the energy of electromagnetic waves. The term is most commonly used in the fields of radiometry, solar energy, heating and ... > read more
Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Electromagnetic spectrum at Wikipedia.org. See the Wikipedia copyright page for more details.
