Let's use the "nearly flat" coordinates.

The "nearly flat" coordinates we used in the previous section are the best coordinates for looking at the paths of test particles in this spacetime.

In[54]:=

  
  <<"Library/Mathematica/MathTensor/3dGeoOut.m"

  MetricgFlag has been turned off.

In[55]:=

  
  Metricg[-2,-2]

Out[55]=

             2  2
  (1 - 4 G M)  r

Up to

How do light rays travel in this spacetime?