Scottish scientists have managed to make light travel slower than the speed of light.
They did it by changing the shape of the photon’s by sending it through a special mask. This change of shape caused the photons to travel slower than the speed of light.
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BBC News reports:
The experiment is likely to alter how science looks at light.
The collaborators – from Glasgow and Heriot-Watt universities – are members of the Scottish Universities Physics Alliance. They have published their results in the journal Science Express.
The speed of light is regarded as an absolute. It is 186,282 miles per second in free space.
Light propagates more slowly when passing through materials like water or glass but goes back to its higher velocity as soon as it returns to free space again.
Or at least it did until now.
Two and a half years ago, the experimenters set out to see if they could slow down light just a little – and keep it moving more slowly.
In a laboratory at Glasgow university, Dr Jacquiline Romero, Dr Daniel Giovannini and colleagues built what amounts to a racetrack for photons, the individual particles of light.