| 词汇 | event-horizon |
| 释义 | event horizon noun[ C ] uk /ɪˌvent həˈraɪ.zən/ us /ɪˌvent həˈraɪ.zən/ physics specialized the outer edge of a black hole, beyond which nothing, including light, can escape: 事界，视界（即黑洞表面） Anything that falls through the event horizon effectively disappears from the universe.任何落入视界的东西在实际上都从宇宙中消失了。 It was Stephen Hawking who introduced the idea of the event horizon. By detecting very little energy from these black hole candidates, we have new proof that event horizons exist. Drop a book through a black hole's outer edge, known as the event horizon, and, according to Einstein's theory of gravitation, it never gets out. To an outside observer, the black hole begins at what is known as the event horizon, an imaginary sphere marking the point of no return. If the energy simply disappeared, then the most likely explanation is that it was sucked into the event horizon of a black hole. Astronomy albedo Andromeda Aquarius Aries asteroid galaxy Gemini geostationary geosynchronous gibbous observatory orbit orbital Orion penumbra substellar sunspot supergiant supermassive supermoon Examples of event horizonevent horizon A 106 km telescope would be able to see free oxygen lines in planetary atmospheres near the pseudo eventhorizon. Nevertheless, every so often, a virtual particle pair will spontaneously appear that straddles the eventhorizon of the black hole. Now, imagine one of the particles were to cross the eventhorizon of the black hole. We now need to discuss what happens when quantum systems, particularly quantum entangled systems, cross the eventhorizon of a black hole. Does it depend upon the existence of some sort of eventhorizon? Our descendants can reach the pseudo eventhorizon but no further. Even though these tree grammars are still context-free, they clearly have a larger eventhorizon, establishing a restricted form of look-ahead. Part of the quantum system crosses the eventhorizon of the black hole. For example, it is conceivable, as demonstrated with the case of anti-correlated particles, that an object may be quantum-entangled with another that is inside a black hole's eventhorizon. Vanishing point at the eventhorizon. Matter hitting a solid, compact object would emit a final burst of energy, whereas material passing through an eventhorizon would not. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Physical insight into the process may be gained by imagining that particle-antiparticle radiation is emitted from just beyond the eventhorizon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With cylinders, the eventhorizon was formed when the object could fit inside the hoop described above. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The part inside the eventhorizon necessarily has a singularity somewhere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As a post-processing step the group computed the eventhorizon for the spacetime. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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