Rayleigh-Jeans law predicted infinite energy emission in ultraviolet range. Term "ultraviolet catastrophe" first used by Paul Ehrenfest in 1911. Classical physics predicted infinite energy emission at high frequencies
Force is a push or pull that can change an object's velocity unless balanced. Force is a vector quantity with magnitude and direction. SI unit of force is newton (N), represented by symbol F
Born in 1879 in Ulm, Germany, to Jewish parents. Showed exceptional mathematical abilities from early age. Renounced German citizenship in 1896 to avoid military service. Graduated from Swiss Federal Polytechnic School in 1900
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Einstein's 1905 Annus Mirabilis papers laid foundation for modern physics. Explained Brownian motion, confirming existence of atoms and molecules. Determined Avogadro's number through statistical atomic behavior analysis
Born in Ulm, Germany in 1879, moved to Munich and Switzerland. Studied physics and mathematics at Swiss Federal Polytechnic School. Obtained Swiss citizenship in 1901 and worked at Swiss Patent Office