How does a Geiger-Müller counter detect radioactivity?
A Geiger counter (Geiger-Muller tube) is a device used for the detection and measurement of all types of radiation: alpha, beta and gamma radiation. Basically it consists of a pair of electrodes surrounded by a gas. The electrodes have a high voltage across them.
Alpha, Beta and Gamma radiations are all ionising radiations. This means that all three forms of radiations have enough energy to pull electrons from atoms turning them into ions. The Geiger-Muller tube makes use of this fact.Geiger counters are used to detect radioactive emissions, most commonly beta particles and gamma rays. The counter consists of a tube filled with an inert gas that becomes conductive of electricity when it is impacted by a high-energy particle. When a Geiger counter...