Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Photoelectric effect was discovered by
(a) Hertz (b) Hallwachs
(c) Lenard (d) Millikan
Answer:(a) Hertz discovered first the photoelectric effect in 1887.
