Multiple choice

How long does it take for radio signals to travel from Earth to the Moon (and vice versa)?

  1. 50.43 seconds

  2. 1 minute

  3. 1.28 seconds
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Light and radio waves travel at the speed of light, and the distance to the moon results in a round-trip or one-way signal delay of approximately 1.28 seconds.

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