Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

About Schwarzschild Solution

  1. Jul 24, 2008 #1
    From the Schwarzschild solution.This solution has two singularities,one at r = 0 and one at r = 2M.I have a questions
    1.Every Mass has these singularities ?
    2.For singularity at r = 0 it is the center of mass ?
    thank you
  2. jcsd
  3. Jul 24, 2008 #2


    User Avatar
    Gold Member

    1. No mass has these singularities. If the mass were to contract inside the r=2M boundary, a black-hole is formed ( it is postulated), in which case there is a singularity at r=0. The apparent one at r=2M may be transformed away with a change of coordinates. In the case of the Earth, say, the actual radius is much greater than 2M and the Schwarzschild metric describes the field outside the matter.

    2. The interior Schwarzschild metric describes the field inside the matter, and it does not have a singularity a r=0.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook