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Homework Help: Time to fall into a black hole.

  1. Nov 18, 2007 #1
    1. The problem statement, all variables and given/known data

    Starting from rest at a great distance, you plunge straight towards a blackhole of mass M. You set your watch to noon as you determine that you are crossing the horizon. How much more time do you have (as measured on your watch) until the instant of crunch?

    2. Relevant equations

    Nothing else is given in the problem. I thought I would need to know the metric.

    3. The attempt at a solution

    If I understand correctly the metric tells me how to measure distance and time so I would just integrate from the r=horizon to r=0 to get the time? Am I on the right track?
  2. jcsd
  3. Nov 20, 2007 #2
    I think yes.You should integrate.
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