Brownian motion

Brownian motion

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Credit: PATRICK DUMAS/LOOK AT SCIENCES/SCIENCE PHOTO LIBRARY

Caption: Particles of flour distributed in air to demonstrate Brownian motion. Brownian motion describes the small seemingly random movements of particles suspended in a fluid. It is named after the Scottish botanist Robert Brown, who first observed the phenomenon. It was later recognised that the movements were caused by the particles colliding with molecules.

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Keywords: black background, brownian motion, erratic, flour, fluid, molecular, molecule, movement, no-one, nobody, particle, particles, physical, physics, random, robert brown, suspension

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