Father of the Theory of Relativity
This page is the CodyCross answer for the clue below from Paris, Group 260, Puzzle 5 (French Cancan).
Question is: Father of the Theory of Relativity
and the answer is: EINSTEIN
Word Meaning:
EINSTEIN — (photochemistry, dated) One mole of photons, regardless of frequency, as used to measure irradiance.
Definitions from Wiktionary.