4. Brownian motion suspensions in liquids Albert Einstein (PhD, 1902-05): applied kinetic theory to particles in liquids derived expression for diffusion constant D used expression to estimate size of water molecule used expression to number N estimate Avogadro’s Good agreement with estimates of by other means N motion Albert Einstein (1905): ‘Brownian paper’ derived expression for mean displacement of particle λ statistical mechanics , and D t relation between λ simplified calculation to 1dimension = 2Dt (Δx)2 But Clear prediction that could be tested experimentally Experimental confirmation of Einstein’s formula
4. Brownian motion Albert Einstein (PhD, 1902-05): suspensions in liquids applied kinetic theory to particles in liquids derived expression for diffusion constant D used expression to estimate size of water molecule used expression to estimate Avogadro’s number N Good agreement with estimates of N by other means Albert Einstein (1905): ‘Brownian motion paper’ derived expression for mean displacement of particle λ statistical mechanics relation between λ , D and t simplified calculation to 1dimension (Δx)2 = 2Dt But Clear prediction that could be tested experimentally Experimental confirmation of Einstein’s formula
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