Asri-unix.1050
net.space
utcsrgv!utzoo!decvax!ucbvax!C70:sri-unix!A.exp@Berkeley
Wed Mar 17 17:33:09 1982
Thought experiment in general relativity
Is the path followed by a light ray which is known to intersect tangentially
at one point an infinitely rigid straight rod always along the rod?



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