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About: Photon surface     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:YagoPermanentlyLocatedEntity, within Data Space : dbpedia.org associated with source document(s)

Type: yago:WikicatBlackHolesyago:BlackHole109223177yago:Location100027167yago:Object100002684yago:PhysicalEntity100001930yago:Region108630039yago:YagoGeoEntityyago:YagoLegalActorGeoyago:YagoPermanentlyLocatedEntity New Facet based on Instances of this Class

Photon sphere (definition):A photon sphere of a static spherically symmetric metric is a timelike hypersurface if the deflection angle of a light ray with the closest distance of approach diverges as For a general static spherically symmetric metric the photon sphere equation is: The concept of a photon sphere in a static spherically metric was generalized to a photon surface of any metric. Both definitions give the same result for a general static spherically symmetric metric.