Bound Radial Null

Some articles on null, bound radial null:

Born Coordinates - Null Geodesics
... We wish to compare the appearance of null geodesics in the cylindrical chart and the Born chart ... line element by setting, we obtain from which we see that the minimal radius of a null geodesic is given by We can now solve to obtain the null geodesics as curves parameterized by an ... An outward bound radial null geodesic may be written in the form Transforming to the Born chart, we find that the trajectory can be written as Similarly for inward bound radial null geodesics ...

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