Bonnor Beam
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In general relativity, the Bonnor beam is an exact solution which models an infinitely long, straight beam of light. It is an explicit example of a pp-wave spacetime.The Bonnor beam can be generalized to several parallel beams traveling in the same direction. Perhaps surprisingly, the beams do not curve toward one another. On the other hand, "anti-parallel" beams (traveling along parallel trajectories, but in opposite directions) do attract each other. This reflects a...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In general relativity, the Bonnor beam is an exact solution which models an infinitely long, straight beam of light. It is an explicit example of a pp-wave spacetime.The Bonnor beam can be generalized to several parallel beams traveling in the same direction. Perhaps surprisingly, the beams do not curve toward one another. On the other hand, "anti-parallel" beams (traveling along parallel trajectories, but in opposite directions) do attract each other. This reflects a general phenomenon: two pp-waves with parallel wave vectors superimpose linearly, but pp-waves with nonparallel wave vectors (including antiparallel Bonnor beams) do not superimpose linearly, as we would expect from the nonlinear nature of the Einstein field equation.
