• Question: how fast is light?

    Asked by 11wiloma to James, Marcus, Martin, Rob, Suzanne on 16 Mar 2012.
    • Photo: Martin Zaltz Austwick

      Martin Zaltz Austwick answered on 15 Mar 2012:

      Light travels at 300,000 km every second in a vacuum. It takes the light from the sun over 8 minutes to reach us.

      The speed of light is different in different materials – you can actually slow down the speed of light to the speed of a bike! http://youtu.be/EK6HxdUQm5s

    • Photo: James Boone

      James Boone answered on 15 Mar 2012:

      Light travels at 670,616,629.38 miles per hour. This is equivalent to travelling round the world 7 times every second!

    • Photo: Marcus Gallagher-Jones

      Marcus Gallagher-Jones answered on 16 Mar 2012:

      I sadly have nothing to add to this really. Though it’d be cool to know what the slowest speed light has been pushed to is.

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