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- event horizon, boundary marking the limits of a black hole. At the event horizon, the escape velocity is equal to the speed of light.
www.britannica.com/topic/event-horizon-black-holeEvent horizon | Definition, Explanation, & Facts | Britannica
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In astrophysics, an event horizon is a boundary beyond which events cannot affect an observer. Wolfgang Rindler coined the term in the 1950s. [1] In 1784, John Michell proposed that gravity can be strong enough in the vicinity of massive compact objects that even light cannot escape. [2]
Mar 3, 2023 · The event horizon is the spherical outer boundary of a black hole loosely considered to be its "surface." It is the point, according to NASA, that the gravitational...
An event horizon is the boundary surrounding a black hole beyond which nothing can escape the gravitational pull, not even light. This means that once something crosses this boundary, it is effectively lost to the outside universe.
The event horizon is the boundary surrounding a black hole beyond which nothing, not even light, can escape. It marks the point at which the gravitational pull becomes so strong that escape velocity exceeds the speed of light.
Oct 13, 2009 · What an event horizon is – its behavior – is described by applying the equations of Einstein’s theory of General Relativity (GR); as of today, the theoretical predictions concerning event...
Oct 3, 2024 · Overview. event horizon. Quick Reference. The surface of a black hole. For a non-rotating black hole, it is a spherical boundary at the black hole's Schwarzschild radius where the escape velocity becomes equal to the speed of light, so no events occurring within it can be seen from outside.
