Who of the following won the Nobel Prize for his work on Photoelectric effect ?

Albert Einstein was awarded the 1921 Nobel Prize in Physics specifically for his discovery of the law of the photoelectric effect [1]. Although he is widely famous for his theories of special and general relativity, the Nobel Committee cited his work on the photoelectric effect as the primary reason for the award [1]. In his 1905 'Annus Mirabilis' papers, Einstein proposed that light consists of discrete packets or quanta of energy, later known as photons [3]. This hypothesis explained how light striking a metal surface causes the emission of electrons, a phenomenon that classical electromagnetism could not account for. Other scientists listed also won Nobel Prizes but for different contributions: Max Planck (1918) for energy quanta, Werner Heisenberg (1932) for quantum mechanics, and Steven Weinberg (1979) for electroweak theory.

Sources

1. [1] https://en.wikipedia.org/wiki/Annus_mirabilis_papers
2. [3] https://guides.loc.gov/einstein-annus-mirabilis/1905-papers