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. . Domains of Physics. . . Speed. Size. . . . . . RelativisticQuantumMechanics. QuantumMechanics. Relativity. ClassicalMechanics. NewtonianCosmology. RelativisticCosmology. . c. Nucleus(10-14 m). Atom(10-10 m). Galaxy(1020 m). c/10. Paul Dirac (1902-84). First to try to combine quantum mec
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1. Lecture 19 Relativity and Quantum Mechanics