http://upload.wikimedia.org/wikipedia/commons/1/1d/Event-horizon-particle.svg(adsbygoogle = window.adsbygoogle || []).push({});

Would there still be a t axis? Would the yellow cone get squished (become one-dimensional) and stretched over the x axis?

Or would it stretch to infinity along the t axis and spread over the entire (x,t) plane?

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# How does a photon's event horizon look like?

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