An electron volt, or eV for short, is a measure of energy. It is quite a small amount of energy similar to the amount of energy possessed by a single photon of light. Other forms of radiation have much more energy. On this web-site energies are often quoted in scientific notation. For example 106 eV is equal to 1,000,000 eV. i.e. 1 with 6 zeroes after it. In another example 3x109 eV would be equal to 3 with 9 zeroes after it or 3,000,000,000 eV.
Here are some examples of radiation of different energies.
|Photon of light|
Can be detected by your eye
|Ultra Violet ray from sun|
Enough to burn your skin
Can pass right through your body
|1000 eV = 1 keV|
detected by the Whipple group's telescope
|1012 eV = 1 TeV|
detected by the
|1015 eV = 1 PeV|
detected by the planned Pierre Auger Observatory
|1020 eV = 100 EeV|
|Highest energy Cosmic Ray ever recorded||3x1020 eV|
This is the amount of energy that you would feel if you dropped a bowling ball on your foot from a height of 1 metre!
|103 eV = 1,000 eV||Kev = Kilo electron volt|
|106 eV = 1,000,000 eV||MeV = Mega electron volt|
|109 eV = 1,000,000,000 eV||GeV =Giga electron volt|
|1012 eV = 1,000,000,000,000 eV||TeV = Terra electron volt|
|1015 eV = 1,000,000,000,000,000 eV||PeV = Peta electron volt|
|1018 eV = 1,000,000,000,000,000,000 eV||EeV = Exa electron volt|
|1021 eV = 1,000,000,000,000,000,000,000 eV||ZeV = Zeta electron volt|