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Quantum Electrodynamics The interaction of light with matter Tristan, Cogapp Pecha Kucha, August 2010

QED: Quantum Electrodynamics

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Page 1: QED: Quantum Electrodynamics

Quantum Electrodynamics

The interaction of light with matter

Tristan, Cogapp Pecha Kucha, August 2010

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Matter

Light

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Schrödinger equation

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Electron orbital shells

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Energy is quantised

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Heisenberg Uncertainty Principle

It is impossible to specify simultaneously, with arbitrary precision, both the momentum and the position of a particle.

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Schrödinger’s cat

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Two-slit experiment

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Refraction of light

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Richard Feynman

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Feynman diagrams

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Time travel

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Annihilation and disintegration

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Magnetic moment of the electron

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99.9999975% accurate

USA Human hair

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Summary

• Wave-particle duality• Quantised energy levels• Uncertainty• Time travel• Spontaneous creation and destruction• … but it works.

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Further reading

www.bbc.co.uk/archive/feynman/

www.roddis.org/qed