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Homework Help: Strange question

  1. Sep 23, 2007 #1
    1. The problem statement, all variables and given/known data

    Einstein's theory of general relativity is relativistic model of gravity. "Relativistic" means it involves the speed of light, c; "gravity" means it involves Newton's constant, G. Use dimensional analysis to derive a formula for the surface area, A, of a black hole of mass M, up to a dimensionless proportionality constant.

    2. Relevant equations


    3. The attempt at a solution

    I have little idea of how to tackle this question. Any sort of help would be appreciable.
  2. jcsd
  3. Sep 23, 2007 #2


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    Not sure I follow the question.
    The only meaningful surface area I can think of for a blackhole is the area of a sphere with the Schwarschild radius.
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