The Fascinating World of Photons

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Questions and Answers

Πώς αλληλεπιδρά η φωτεινή ακτινοβολία με την ύλη σύμφωνα με τη θεωρία του Planck;

  • Διακριτά (correct)
  • Συνεχόμενα
  • Ασαφές
  • Καθόλου

Πώς αλληλεπιδρούν τα ηλεκτρόνια με τα φωτόνια;

  • Δεν αλληλεπιδρούν
  • Και σαν κύματα και σαν σωματίδια
  • Σαν σωματίδια (correct)
  • Σαν κύματα

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Study Notes

  • Classical electromagnetic theory could not explain all phenomena related to the interaction of light with matter.
  • Planck introduced the theory of light quanta (photons) in 1900 to explain the radiation emitted by a heated body.
  • Einstein used the theory of photons to explain the photoelectric effect.
  • According to the quantum theory of Planck, light is emitted and absorbed by atoms in a discontinuous manner, with each atom emitting or absorbing a quantum of energy (photon).
  • When light falls on matter, atoms absorb the radiation discontinuously, with each atom absorbing a single photon.
  • Each photon of light has a specific frequency and energy.
  • When light hits metals, it transfers energy from a photon to one of the metal's electrons.
  • Electrons interact with photons as if they were particles.
  • The theory of photons does not negate the wave nature of light.
  • The energy of a photon depends on its frequency, which is a wave property of light.

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