Physics.
the effect of ultraviolet radiation in lowering the sparking voltage across a spark gap: an example of photoelectric effect.
[ after H. R. HERTZ ]
Physics.
the effect of ultraviolet radiation in lowering the sparking voltage across a spark gap: an example of photoelectric effect.
[ after H. R. HERTZ ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012