Crystals and photons

  title={Crystals and photons},
  author={Chandrasekhara Venkata Sir Raman},
  journal={Proceedings of the Indian Academy of Sciences - Section A},
  • C. Raman
  • Published 1941
  • Physics
  • Proceedings of the Indian Academy of Sciences - Section A
SummaryThe excitation of the optical modes of vibration of a crystal lattice by radiations incident on the crystal is discussed. The optical vibrations can be described as oscillations of the interpenetrating lattices in the crystal with respect to one another. They give rise to a periodic variation of the physical constants,e.g., electric dipole-moment, optical polarisabilities, structure amplitudes, which influence the behaviour of radiation in various ranges of frequency in its passage…