Demonstration: gamma radiation is part of the electromagnetic spectrum. It is not absorbed by the air, but its intensity...
As light spreads out from a source, its intensity decreases due to the processes of absorption and spreading.
The focus of this episode is the properties of ionizing radiation. It is a good idea to introduce these through a...
This episode considers the ways in which the intensity of radiation decreases with distance from the source.
On the one hand pupils are quite prepared to accept that light can travel 150 million kilometres from the Sun to the Earth and...
Recognising and celebrating outstanding contributions to the field of physics education.