Counting ions and ionisation
These demonstrations show different ways of detecting and counting ionisation. This is useful preparation for understanding the Geiger-Müller tube. In addition, the demonstrations give a visual indication of changes to atoms and molecules; this will help remove some of the mystery of ionisation and contribute to students’ models of the atom.
- Counting spoonfuls of salt
- Showing that a spark can pass through air
- Counting matches with an EHT supply
- Counting matches with a Van de Graaff generator
- The spark counter
- The Geiger-Müller tube