Moderate

The existence of photons was confirmed by:

Correct answer: C. Einstein

  • A. Compton
  • B. De' broglie
  • C. Einstein
  • D. Max planck

Explanation

The concept originated (1905) in Albert Einstein's explanation of the photoelectric effect, in which he proposed the existence of discrete energy packets during the transmission of light. The discrete energy packets are quanta or photon.

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About Dawn of Modern Physics

Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.

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