Blog
Save
Email
Print
ShareThe 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
Microwave — Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves. ... > read more
Gamma ray — Gamma rays are an energetic form of electromagnetic radiation produced by radioactive decay or other nuclear or subatomic processes such as ... > read more
Hertz — The hertz (symbol: Hz) is the SI unit of frequency. One hertz simply means "one per second" (1 / s); 100 Hz means "one hundred per second", and so ... > read more
Electrical phenomena — Electrical phenomena are commonplace and unusual events that can be observed which illuminate the principles of the physics of electricity and are ... > read more
Radiography — Radiography is the creation of images by exposing a photographic film or other image receptor to X-rays. Since X-rays penetrate solid objects, but ... > read more
Spectroscopy — Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency. Spectroscopy is often used in physical and ... > read more
Solar flare — A solar flare is a violent explosion in the Sun's atmosphere with an energy equivalent to tens of millions of hydrogen bombs. Solar flares take place ... > 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.
Recommend this page on Facebook, Twitter,
and Google +1:
Other bookmarking and sharing tools:
more 