ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Geiger-Muller tube. Experiment with a radioactive source (lower left), a Geiger-Muller tube (lower right) and a ratemeter (centre). A Geiger-Muller tube is used to detect levels of of radiation. Radiation passing through gas in the tube ionises it, briefly allowing a current to flow. This electrical pulse is recorded, with radioactive intensity proportional to the number of pulses in a given time period. It can detect alpha, beta and gamma radiation. Speakers (upper right) are being used to amplify the click which is produced each time the gas is ionised.
Model release not required. Property release not required.