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Schwarzschild radius

  1. Mar 6, 2015 #1
    Is it possible to derive r=GM/c^2 classically(as in newtonian gravity) without using eeinstein field equation?
  2. jcsd
  3. Mar 6, 2015 #2


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    You can set the escape velocity to ##c## and find this radius immediately in Newtonian gravity: ##c=\sqrt{\frac{2GM}{r}}\rightarrow ~r=\frac{2GM}{c^2}## however, what this radius means in Newtonian gravity is not the same as what it means in GR.
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