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Time for radio waves to reach moon?

  1. Sep 20, 2015 #1
    So I was thinking that radio waves travel at the speed of light, approximately 300,000,000 m/s.I was wondering how much time it would take if the average distance from Earth to the Moon is 384,000 km.
  2. jcsd
  3. Sep 20, 2015 #2


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    Staff Emeritus
    Science Advisor

    Well, how many kilometers are in 300,000,000 meters?
  4. Sep 20, 2015 #3


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    Staff: Mentor

    Using speed = distance / time, what do you get? If that doesn't help, where do you get stuck?

    (Drakkith slipped in before I finished my post...)
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