| 单词 |
event horizon |
| 释义 |
event horizon
event horizonn. The region, usually described as spherical, marking the outer boundary of a black hole, inside which the gravitational force is strong enough to prevent all matter and radiation from escaping.event horizon n (Astronomy) astronomy the surface around a black hole enclosing the space from which electromagnetic radiation cannot escape due to gravitational attraction. For a non-rotating black hole, the radius is proportional to the mass of the black hole event′ hori`zon
n. the boundary around a black hole on and within which no matter or radiation can escape. [1970–75] Translationsevent horizon
event horizon The boundary of a black hole: for a nonrotating black hole it is a spherical ‘surface’ having a radius equal to the Schwarzschild radius for a body of a given mass. The event horizon marks the critical limit where the escape velocity of a collapsing body becomes equal to the speed of light and hence no information can reach an external observer. Calculations predict that a body shrinking within its event horizon – or indeed any body that falls inside the event horizon of another – inevitably contracts to a singularity at the precise center of the black hole.event horizon[i′vent hə‚rīz·ən] (relativity) The boundary of a region of space-time from which it is not possible to escape to infinity. Symbolized İ +. See EH
See EV |
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