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Lights Speed ?

  1. Aug 14, 2011 #1
    If light travels at 186,000 miles per second - and in theory nothing can travel faster. What would the speed of "dark" be? Dark occupies all space at the same time! It would seem to me anyway that "dark" would at some point catch up and pass light once the light source was extinguished.
  2. jcsd
  3. Aug 14, 2011 #2
    Light is made of photons/electromagnetic waves they both travel at c. Darkness is the absence of photons/electromagnetic waves(This doesn't really happen in the universe ). There is nothing that travels so speed of dark is truly meaningless concept .
  4. Aug 14, 2011 #3
    This is exactly like asking:
    -what is the speed of silence is and why doesn't it overtake sound?
    -what is the speed of no traffic and why doesn't it overtake traffic?
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