Quantum and Nuclear

Becquerel’s serendipity

Stories from Physics for 11-14 14-16 16-19 IOP RESOURCES

Serendipity sometimes plays a role in the development of physics, for instance in the case of Henri Becquerel’s discovery of radiation. The French physicist had assumed that sunlight was involved in uranium-enriched crystals’ ability to expose photographic plates. A period of inclement weather forced Becquerel to pause his experiments so he placed his crystal and plate in a closed drawer. On removing them, he was surprised to find the fogging effect continued in the absence of light, leading him to hypothesise a novel explanation for the phenomenon: radioactive decay.

References

IOP AWARDS 2025

Teachers of Physics Awards

The Teachers of Physics Award celebrates the success of secondary school physics teachers who have raised the profile of physics and science in schools. Nominations for 2025 are now open.

Start your nomination now