Gamma rays are part of the Electromagnetic Spectrum! According to en.wiktionary.org/wiki/electromagneticspectrum the electromagnetic spectrum is:
“The entire range of wavelengths of all known electromagnetic radiations extending from gamma rays through visible light, infrared, and radio waves, to X Rays. It is divided into 26 alphabetically designated bands, having frequencies of 0 to at least 10 hertz”
Gamma rays are the smallest in wavelength but the largest in energy on the electromagnetic spectrum.
Gamma Rays are created by radioactive atoms, nuclear explosions, and Supernova explosions! Gamma rays can kill living things so many doctors use this to there advantage by creating medicine that uses gamma rays to kill cancerous cells. As I said before gamma rays have the largest amount of energy in the electromagnetic spectrum. So it has been discovered that a gamma ray burst can release the amount of energy the sun emits over a ten billion year time span, in ten seconds!
Gamma rays are the most powerful energy source on the electromagnetic spectrum. They are created by radioactive atoms, nuclear explosions, and supernova explosions.
To see a cool video go to: http://video.google.com/videoplay?docid=-4256770211230710093
To learn more go to:http://science.hq.nasa.gov/kids/imagers/ems/gamma.html