Chin. Phys. Lett.  1986, Vol. 3 Issue (1): 29-32    DOI:
Original Articles |
A SPECIAL CAUSAL RELATION IN TAUB’S AND KAR’S PLANE-SYMMETRIC SPACETIMES
KUANG Zhiquan1;LIANG Canbin2
1Institute of Mathematics, Academia Sinica, Beijing 2Department of Physics, Beijing Normal University, Beijing
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KUANG Zhiquan, LIANG Canbin 1986 Chin. Phys. Lett. 3 29-32
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Abstract It is proved that in Taub's and Kar's plane-symmetric spacetime, a future directed null geodesic emanating from a point “p”will enter the chronological future of “p”. Physically, this implies that the light signal from a movie projector with its back to the screen will finally come back to the screen and form a movie which looks exactly the same as the true one.



Published: 01 January 1986
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1986/V3/I1/029
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