English Explanatory Dictionary

photon sphere

English dictionary entry

Meanings

noun

Of a black hole, a spherical limit around a black hole at such distance that any photon meeting it tangentially is constrained to travel in a circular orbit; (more loosely) the region between this limit and the event horizon.

Word forms

photon sphere photon spheres

Etymology

From photon + sphere.

Synonyms

photon circle last photon orbit

Related words

accretion disc black hole black hole jet ergosphere event horizon innermost stable circular orbit photosphere Roche limit singularity

Previous

Next

This entry uses open data from Wiktionary (CC BY-SA/GFDL). Word forms are used for search and are not indexed as separate pages.

Back to search All on P Russian dictionary Dahl dictionary