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Quantum Electrodynamics
The interaction of light with matter
Tristan, Cogapp Pecha Kucha, August 2010
Matter
Light
Schrödinger equation
Electron orbital shells
Energy is quantised
Heisenberg Uncertainty Principle
It is impossible to specify simultaneously, with arbitrary precision, both the momentum and the position of a particle.
Schrödinger’s cat
Two-slit experiment
Refraction of light
Richard Feynman
Feynman diagrams
Time travel
Annihilation and disintegration
Magnetic moment of the electron
99.9999975% accurate
USA Human hair
Summary
• Wave-particle duality• Quantised energy levels• Uncertainty• Time travel• Spontaneous creation and destruction• … but it works.
Further reading
www.bbc.co.uk/archive/feynman/
www.roddis.org/qed