| 词汇 | light-cone |
| 释义 | BETA light conecollocation in Englishmeanings of lightand coneThese words are often used together. Click on the links below to explore the meanings. light noun uk /laɪt/ us /laɪt/ the brightness that comes from the sun, fire, etc. and from electrical devices, and that allows things to ... See more at light cone noun[ C ] uk /kəʊn/ us /koʊn/ a shape with a flat, round or oval base and a top that becomes narrower until it forms ... See more at cone Examples of light conelight cone For example, a lightcone is a null hypersurface. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. We as observers can still signal different parties and places as long as we live within their "past" lightcone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There is also a stability assumption which restricts the spectrum of the four-momentum to the positive lightcone (and its boundary). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A lightcone represents any possible future evolution of an object given its current state, or every possible location given its current location. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lightcone coordinates are sometimes used to describe relativistic collisions, especially if the relative velocity is very close to the speed of light. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the latter, not all points are causally related, but only those for which one point falls within the lightcone issuing from the other. No such refinement is necessary for the passage from 'before' to 'at' since 'enter', 'at' and 'exit' all coincide there, this being the apex of the lightcone. In curved spacetimes the lightcone will be tilted along the spacetime's geodesic. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In simple examples of spacetime metrics the lightcone is directed forward in time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lightcone coordinates can also be generalized to curved spacetime in general relativity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each element may only be influenced by events which are located in the backward lightcone of its point in spacetime (i.e., the past). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Worldlines of light form the boundary of the lightcone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A more significant notion is absolute future or the future lightcone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The southwest corner of the intersection would also include an oculus for a lightcone above the platform. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As the island is well outside the lightcone of coastal cities, the stargazing is spectacular, with nightly meteor showers not uncommon. 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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