Question: Who developed an explanation for the photoelectric effect?
Disambiguated questions and answers: question: Who discovered and developed an explanation for the photoelectric effect in 1887?
Who developed an explanation for the photoelectric effect in 1888-1891?
Who developed an explanation for the photoelectric effect in 1900?
Who developed an explanation for the photoelectric effect in 1905?
answer: Heinrich Hertz
Hertz
Aleksandr Stoletov
Stoletov
Max Planck
Planck
Albert Einstein
Einstein
Natural Questions answer: Albert Einstein (from the Wikipedia article "Photoelectric effect")