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Homework Help: Light attracted to earths gravity

  1. Apr 19, 2012 #1
    Falling light. According to general relativity and the equivalence principle, light is bent by gravity. Consider two tall, perfectly reflecting mirrors exactly 7 m apart and facing each other. A beam of light is directed horizontally through a hole in one of the mirrors 13 m above the ground.

    (a) Determine the time it takes for the light to strike the ground.

    b) The light will undergo N reflections (i.e., N/2 reflections from each mirror) before it strikes the ground. Find N.
  2. jcsd
  3. Apr 19, 2012 #2


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    Homework problems are to be posted using a specific format. Please read the forum rules. You have to show some effort on your part, you can't just ask for the answer.
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