Using the microwave oven in your kitchen, you can measure a fundamental property of the universe: the speed of light. All you need are some tasty marshmallows and a ruler.

There is a lot more to the universe than the light you and I can pick up with our eyes and brains. Although its a shame that we can’t see them naturally we can use technology to reveal the wavelengths of light normally invisible to us. Visible light is only part of the electromagnetic spectrum (a very small part) and I thought it would be interesting to see some familiar objects in unfamiliar ways.