Multiple choice

Who discovered photo electric effect?

  1. Einstein

  2. Faraday

  3. Dalton

  4. Rutherford

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A Correct answer
Explanation

Albert Einstein explained the photoelectric effect in 1905, showing that light behaves as discrete packets of energy (quanta/photons) rather than continuous waves. This groundbreaking work earned him the Nobel Prize in Physics in 1921. While Heinrich Hertz first observed the phenomenon in 1887, Einstein provided the theoretical explanation that revolutionized quantum physics. Faraday, Dalton, and Rutherford made important contributions to other areas of physics but not the photoelectric effect.

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