by Ciro Santilli (@cirosantilli, 32)
Photon hits excited electron, makes that electron go down, and generates a new identical photon in the process, with the exact same:This is the basis of lasers.

Ancestors

  1. Absorption, spontaneous and stimulated emission
  2. Dirac equation
  3. Relativistic quantum mechanics
  4. Quantum mechanics
  5. Particle physics
  6. Physics
  7. Natural science
  8. Science
  9. Index

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