8/18/2023 0 Comments Event horizon![]() ![]() The spherical surface defined by this radius is termed the event horizon of the black hole because events inside the event horizon can have no effect on events outside it. Essentially, there are no straight lines connecting any point that is within a certain radius of a black hole (which, in theory, means there is no dimension) to any point that is farther away. Within a certain radius of a black hole, all geodesics are so warped that a photon of light cannot escape to another part of the universe. Furthermore, gravity warps space, bending geodesics the stronger a gravitational field is in a certain region, the more bent the geodesics are in that region. In early 2001, for instance, data gathered by NASA ’s Hubble Space Telescope and the Chandra X-ray Observatory independently provided strong evidence of an event horizon, the observable boundary region surrounding an unobservable black hole.Īccording to general relativity, the path taken by a beam of light is the shortest distance between two points such a path is called a geodesic. Such a gravitation field bends light so much that it cannot escape from it and go out into the universe. Specifically, an event horizon is the regions around a gravity field of a black hole. In general usage, an event horizon is a limiting boundary beyond which nothing can be observed or measured with regard to a particular phenomena (e.g., the cosmic event horizon beyond which nothing can be observed from Earth). 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.
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