WOLFRAM|DEMONSTRATIONS PROJECT

Geodesics in Schwarzschild Space

​
angular momentum ℓ
4
Κ
1
0
-1
maximum τ
4850
zoom
FE`zoom$$2678058698617650919714418210815837845329
The right-hand side of the graphic in this Demonstration shows a geodesic outside the Schwarzschild radius
r
s
, while the left-hand side shows the effective radial potential. The latter depends on the value of the angular momentum
ℓ
, which you can vary with the first slider. The effective radial potential also depends on
K
: a particle orbit has
K=1
, a null geodesic (such as a light-ray) has
K=0
, and a time-like geodesic has
K=-1
. You can specify the starting point of the integration for both energy and radius by clicking on an allowed value, on or above the curve on the left.
The two remaining controls, "maximum
τ
" and "zoom", specify the length of proper integration time and the zoom scale for the graphic on the right.