Spontaneous and Stimulated Emission of Radiation by Professor G Srinivasan

Spontaneous and Stimulated Emission of Radiation by Professor G Srinivasan

International Centre for Theoretical Sciences via YouTube Direct link

Absorption and Emission coefficients in terms of the Einstein Coefficients.

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10 of 33

Absorption and Emission coefficients in terms of the Einstein Coefficients.

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Spontaneous and Stimulated Emission of Radiation by Professor G Srinivasan

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  1. 1 Summer course 2018 - A Random walk in astro-physics
  2. 2 Spontaneous and Stimulated Emission of Radiation Lecture - 02
  3. 3 Quantum theory of radiation
  4. 4 The opening sentence of Einstein's 1917 paper:
  5. 5 But Einstein wanted his quantum theory to give Planck's Law!
  6. 6 Einstein's profound insight in 1917:
  7. 7 Definition of the Einstein coefficients in Quantum Mechanics
  8. 8 Spontaneous Emission
  9. 9 Stimulated emission
  10. 10 Absorption and Emission coefficients in terms of the Einstein Coefficients.
  11. 11 Absorption coefficient alpha
  12. 12 It is useful to regard stimulated emission as negative absorption .
  13. 13 Inverted population
  14. 14 Two-state systems in Quantum Mechanics
  15. 15 Zeeman splitting of energy levels
  16. 16 Hyperfine splitting of energy levels
  17. 17 Fine structure of energy levels of electron in atoms
  18. 18 Hyperfine Splitting
  19. 19 Hyperfine splitting of ground state of hydrogen atom Enrico Fermi, 1930
  20. 20 After some standard steps,
  21. 21 Radial wave function of Is electron in a hydrogen atom
  22. 22 Hyperfine splitting of n=1 level of hydrogen atom
  23. 23 Ammonia molecule
  24. 24 Electric dipole moment of Ammonia molecule
  25. 25 Two-state systems in Quantum Mechanics
  26. 26 Maser
  27. 27 Ammonia Maser
  28. 28 Hydrogen Maser
  29. 29 The Nobel Prize in Physics 1964
  30. 30 3-level laser
  31. 31 Celestial Masers
  32. 32 Next Lecture - The Interstellar Medium
  33. 33 Q&A

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