Brownian Movement and Molecular Reality Additional topics comprise the magnetic

Additional topics comprise the magnetic field of steady currents

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Reprint of the American Zionist Emergency Council

Brownian Movement and Molecular Reality Additional topics comprise the magneticHow do we know that molecules really exist? An important clue came from Brownian movement, a concept developed in 1827 by botanist Robert Brown, who noticed that tiny objects like pollen grains shook and moved erratically when viewed under a microscope. Nearly 80 years later, in 1905, Albert Einstein explained this "Brownian motion" as the result of bombardment by molecules. Einstein offered a quantitative explanation by mathematically estimating the