The idea that light travels is not uncommon in the 21 st century. Pupils will often refer to things moving at the speed of...

Physics Narrative 5-11 11-14

The speed of light plays a central role in astronomy and in physics.

Physics Narrative 11-14

The speed of light is constant. It is the same everywhere, and is the top speed: a universal speed limit. The way we measure...

Physics Narrative 14-16