Cosmos Magazine

A short history of light

You are radiating. You always have been.

You are radiating at a frequency of 24,000GHz. Perhaps, by the end of this article, you will be radiating at a higher frequency as you discover the exciting link between quantum physics and dogs.

Or you may just have an actual fever – booked your flu shot yet?

We all radiate light. But not visible light. The universe has a rainbow that is made up of so many more colours of light than the familiar spectrum of ROYGBIV (red, orange, yellow, green, blue, indigo, violet). When we talk about the light of the universe at its most minute level, the quantum level, we’re talking about light as photons. So, what exactly is

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