Counting the arrival of ionising radiations is a cumulative affair–the result is an ever-increasing number. Just count the...

Physics Narrative 14-16

When observing demonstrations with radioactive sources and a Geiger–Müller tube, students are likely to associate a high rate...

Teaching Guidance 14-16

There is a very precise and important result that follows from the inability to alter the chance that an ionising radiation is...

Physics Narrative 14-16

This is an interesting point relating to the limitations of models, which we'd recommend exploring in full with the students:

Teaching Guidance 14-16

This episode introduces the ubiquitous nature of radioactivity, and considers its detection. It draws on students’ previous...

Lesson 16-19

Radioactivity is the random and spontaneous breakdown of unstable atomic nuclei involving the emission of alpha, beta or gamma...

Glossary Definition 16-19