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Equation 8 · Einstein's Random Walk and the Mathematics of Genetic Drift

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RR

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the gas constant. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.

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RR

Symbol R

the gas constant.

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where R is the gas constant, T the absolute temperature, and N Avogadro’s number [ 1 ] . That last dependency was the trap door: if D could be read off a microscope by timing how far a particle wandered, and every other term in the equation was already known independently, then watching one particle jiggle became a way to count atoms.

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