According to physicist Albert Einstein's theory of special relativity, on which much of modern physics is based, nothing in the universe can travel faster than light. The theory states that as ...

A weak vibration doesn't travel very far. Discover more about volume. All about light Learn how light travels and how we see different colours. What is light? Light comes from different sources ...

Watch this video which explains how light travels into our eyes so that we can see things. Of course, you can only see something when there's light. And what is light? It's energy that zooms ...