• Question: How fast does light travel?

    Asked by HannahD to Heather, Helen, Hugh, Jane, Julian on 14 Nov 2014.
    • Photo: Helen Johnson

      Helen Johnson answered on 14 Nov 2014:

      The speed of light is about 300 000 km/s, or about 190 000 miles per SECOND! Nothing can travel faster than this.

    • Photo: Julian Onions

      Julian Onions answered on 14 Nov 2014:

      Yes light is the cosmic speed limit. If it could go in circles, light would go round the earth 7 and 1/2 times in a second!
      Light is very fast, but for us astronomers very slow, we see things out there that happened a long while ago because of the speed of light.

Comments