411 REFERENCE · Wiktionary
Grotthuss-Draper law
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Proposed in 1817 by Theodor Grotthuss and in 1842, independently, by John William Draper.
Proper noun
1
en physics The principle stating that only that light which is absorbed by a system can bring about a photochemical change.
en eponyms