Question of the Week Podcast

Question of the Week episode

Sun, 13th Jun 2010

What happens to light travelling at light speed?

Long exposure of Paris at night (c) Mark Planard

We work out what would happen if you shone a light whilst travelling at light speed. Would you see anything? Would an observer see anything? Plus, we ask if dogs really can watch TV.

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In this edition of Question of the Week

Full Transcript

  • How fast does a moving light source go?

    What would happen if you were driving at light speed and you switch your headlights on? What about a lit torch being carried at light speed? What would happen then?



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