Crossword clue: the amount of electromagnetic radiation leaving or arriving at a point on a surface

The most common answer is glowing (7 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

glowing 7 letters wn-def

the amount of electromagnetic radiation leaving or arriving at a point on a surface

radiance 8 letters wn-def

the amount of electromagnetic radiation leaving or arriving at a point on a surface