event horizon
event horizon
event horizon
event′ hori`zon
n.
| 单词 | event horizon |
| 释义 | event horizonevent horizonevent horizonevent′ hori`zonn. event horizonevent horizonThe 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]See EV |
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