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Meaning of apparent horizon | Babel Free

Noun CEFR B2

Definitions

A surface that is the boundary between lightrays that are directed outwards and moving outwards and those directed outward but moving inward.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

apparent magnitude apparent temperature apparent time Apparently Apparentness apparicine

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