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Results tagged with event-horizon
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user 211652
An event horizon is a type of boundary such that any information past this boundary is inaccessible to the observer it is defined for. Common examples are the Schwarzschild radius of a black hole (which is defined commonly for all observers outside this radius) and the cosmological event horizon (which is defined as a radius from an observer)
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How do light rays move parallel at the event horizon and why is this necessary?
This whole question and subquestions are based on the assumption that light rays on the event horizon are normal to the event horizon, so my apologies if this is not correct
In A Brief History of Tim …
