|
Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions. Gamma-rays can kill living cells, a fact which medicine uses to its advantage, using gamma-rays to kill cancerous cells.
|
science.hq.nasa.gov/kids/imagers/ems/gamma.html
science.hq.nasa.gov/kids/imagers/ems/gamma.html
|
|
|
|
Gamma rays were discovered by Villard, a French physicist in 1900. ... Gamma rays can be produced in labs through the process of nuclear collision and also through the artificial radioactivity that accompanies these interactions. The high-energy nuclei needed for the collisions are accelerated by devices such as the...
|
www.smgaels.org/physics/gamm_1.htm
|
|
|
|
Long before experiments could detect gamma-rays emitted by cosmic sources, scientists had known that the Universe should be producing these photons. ... Gamma-rays coming from space are mostly absorbed by the Earth's atmosphere. So gamma-ray astronomy could not develop until it was possible to get our detectors above all...
|
imagine.gsfc.nasa.gov/docs/science/know_l2/history_gamm...
imagine.gsfc.nasa.gov/docs/science/know_l2/history_gamma.html
|
|
|
|
|
This site is intended for students age 14 and up, and for anyone interested in learning about our universe. ... My question is why are gamma-rays so much more harmful than radio waves? I already understand that gamma-rays have a higher energy level in them than radio waves, but what makes this energy so harmful?
|
imagine.gsfc.nasa.gov/docs/ask_astro/answers/980109b.ht...
imagine.gsfc.nasa.gov/docs/ask_astro/answers/980109b.html
|
|
Now we know that gamma rays are a form of EM radiation similar to x rays. Gamma rays tend to have a higher energy and a shorter wavelength than x rays do. However, the dividing line between these two forms of radiation is not clearly defined.
|
www.hps.org/publicinformation/ate/q654.html
|
|
Gamma-ray bursts, brief flashes of gamma-ray energy lasting from a few milliseconds to a few hundred seconds, disappear almost as fast as they appear. These bursts occur randomly, and their source is unknown. Gamma-rays are far outside the visible part of the spectrum and cannot be detected by the human eye.
|
science.nasa.gov/newhome/headlines/ast27jan99_1.htm
|
|
Therefore, a source of a gamma ray emiting isotope, say, Cobalt-60 can be taken to such sometimes remote places as construction sites and oil fields. ... There are many medical tests that use gamma ray emitting isotopes for diagnosis. Radioactive Iodine is used to diagnose problems with the thyroid, and another isotope is...
|
www.madsci.org/posts/archives/apr2001/986273704.Ph.r.ht...
www.madsci.org/posts/archives/apr2001/986273704.Ph.r.html
|
|
Caption for the animations: Gamma rays may map regions of early structure formation in the Universe. ... Studying gamma rays from clusters, particularly with the Gamma-ray Large Area Space Telescope (planned for a 2006 launch) will reveal new information about the cosmic web and the first structures to form in the Universe.
|
www.gsfc.nasa.gov/topstory/20020812gamma.html
www.gsfc.nasa.gov/topstory/20020812gamma.html
|
|
