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- DictionaryE·vent ho·ri·zon/əˈvent/
noun
- 1. a theoretical boundary around a black hole beyond which no light or other radiation can escape.
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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. In 1784, John Michell proposed that gravity can be strong enough in the vicinity of massive compact objects that even light cannot escape.
Mar 3, 2023 · The event horizon is a boundary that marks the outer edge of black holes. It is the point at which nothing, not even light, can escape.
Jun 1, 2024 · Event horizon, boundary marking the limits of a black hole. At the event horizon, the escape velocity is equal to the speed of light. Since general relativity states that nothing can travel faster than the speed of light, nothing inside the event horizon can ever escape beyond it, including light.
Mar 19, 2024 · The meaning of EVENT HORIZON is the surface of a black hole : the boundary of a black hole beyond which nothing can escape from within it.
Dec 8, 2016 · Matt shows you an elegant tool for understanding this mysterious region of spacetime. This episode is supported by The Great Courses Plus. Go to http://ow.ly/WPIo306GotR for your one month...
Apr 30, 2024 · An event horizon is a boundary in spacetime beyond which events cannot affect an observer. It is most commonly associated with black holes, where the gravitational pull is so strong that not even light can escape.
Sep 8, 2020 · A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can escape it. A black hole’s “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos.
Oct 13, 2009 · What is an Event Horizon? The event horizon of a black hole is the boundary (‘horizon’) between its ‘outside’ and its ‘inside’; those outside cannot know anything about things (‘events’) which...
Event Horizon. This is what makes a black hole black. We can think of the event horizon as the black hole’s surface. Inside this boundary, the velocity needed to escape the black hole exceeds the speed of light, which is as fast as anything can go. So whatever passes into the event horizon is doomed to stay inside it – even light.
May 23, 2018 · An event horizon, as defined within general relativity, is a boundary in spacetime (the four-dimensional structure of the universe, with three-dimensional space and one-dimensional time) in which events are not realized by an observer so cannot affect the observer.
