ˈhälˌväks- noun
Usage: usually capitalized H
Etymology: after Wilhelm Hallwachs died 1922 German physicist
: a photoelectric effect in which a negatively charged body in a vacuum is discharged upon exposure to ultraviolet radiation
ˈhälˌväks- noun
Usage: usually capitalized H
Etymology: after Wilhelm Hallwachs died 1922 German physicist
: a photoelectric effect in which a negatively charged body in a vacuum is discharged upon exposure to ultraviolet radiation
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012