Search the Glossary by either clicking on a letter or typing a Keyword into the search box.


Ionisation is the process whereby an Atom or molecule gains or loses an Electron and thus becomes an Ion. Ionising Radiation has sufficient energy to be able to ionise atoms and molecules and thus produce ions.

Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness

– Bill Bryson