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    Scientists slow the speed of light - Forum

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    Forum moderator: arya, dethalternate 
    Forum » untoten.reich » Science, Astronomy, Nature » Scientists slow the speed of light
    Scientists slow the speed of light
    dethalternateDate: Monday, 02-February-2015, 6:00 PM | Message # 1
    -- dragon lord--
    Group: lords
    Messages: 3409
    Status: Offline
    By Kenneth Macdonald
    BBC Scotland Science Correspondent

    A team of Scottish scientists has made light travel slower than the speed of light.

    They sent photons - individual particles of light - through a special mask. It changed the photons' shape - and slowed them to less than light speed.

    The photons remained travelling at the lower speed even when they returned to free space.

    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.


    Forum » untoten.reich » Science, Astronomy, Nature » Scientists slow the speed of light
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