A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow, which is slightly larger and fainter than the first – and the colours are in the opposite ...
Researchers at The University of Manchester’s National Graphene Institute have created optical devices with a unique range of tunability, covering the entire electromagnetic spectrum, including ...
They're your eyes, and they receive signals that fall in the range of visible light ... There's lots to discover in the electromagnetic spectrum. Here's a tour that begins with radio waves ...