Big Idea: Waves carry information without causing a permanent change on the intervening medium. More info...
Browse worksheets, ideas, lesson plans and more for students aged 5-19 and narrow your search using the filters below.
As light spreads out from a source, its intensity decreases due to the processes of absorption and spreading.
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.