Definitions for apparent horizon
ap·par·ent hori·zon

Princeton's WordNetRate this definition:0.0 / 0 votes

1. horizon, apparent horizon, visible horizon, sensible horizon, skylinenoun

   the line at which the sky and Earth appear to meet

WikipediaRate this definition:0.0 / 0 votes

1. Apparent horizon

   In general relativity, an apparent horizon is a surface that is the boundary between light rays that are directed outwards and moving outwards and those directed outward but moving inward. Apparent horizons are not invariant properties of spacetime, and in particular, they are distinct from event horizons. Within an apparent horizon, light does not move outward; this is in contrast with the event horizon. In a dynamical spacetime, there can be outgoing light rays exterior to an apparent horizon (but still interior to the event horizon). An apparent horizon is a local notion of the boundary of a black hole, whereas an event horizon is a global notion. The notion of a horizon in general relativity is subtle and depends on fine distinctions.

ChatGPTRate this definition:0.0 / 0 votes

1. apparent horizon

   An apparent horizon is a boundary in spacetime separating regions where an observer cannot receive light signals from events occurring beyond that boundary. It is perceived by an observer falling into a black hole, marking the limit where light with radial direction can apparently "stand still". The position of the apparent horizon can change over time depending on the observer's viewpoint and surrounding conditions. Its location, unlike the event horizon, is dependent on the local distribution of matter and energy.

WikidataRate this definition:0.0 / 0 votes

1. Apparent horizon

   In general relativity, an apparent horizon is a surface that is the boundary between light rays that are directed outwards and moving outwards, and those directed outwards but moving inwards. Apparent horizons are not invariant properties of a spacetime. They are observer-dependent, and in particular they are distinct from absolute horizons. See, however, the articles on ergosphere, Cauchy horizon, the Reissner-Nordström solution, photon sphere, Killing horizon and naked singularity; the notion of a horizon in general relativity is subtle, and depends on fine distinctions.

Dictionary of Military and Associated TermsRate this definition:0.0 / 0 votes

1. apparent horizon

   The visible line of demarcation between land/sea and sky.

Dictionary of Nautical TermsRate this definition:0.0 / 0 votes

1. apparent horizon

   See HORIZON.

Matched Categories

1. • Line
   • Perspective

How to pronounce apparent horizon?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

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   Fred

   US English

   Tessa

   South African

How to say apparent horizon in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of apparent horizon in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of apparent horizon in Pythagorean Numerology is: 7

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=apparent horizon
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Apparent_Horizon
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=apparent horizon
5. ^ Dictionary of Military and Associated Terms
   https://www.tradoc.army.mil/wp-content/uploads/2020/10/AD1029823-DOD-Dictionary-of-Military-and-Associated-Terms-2017.pdf
6. ^ Dictionary of Nautical Terms
   https://www.gutenberg.org/cache/epub/26000/pg26000-images.html#:~:text=apparent horizon