Title=Brownian motion

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Tracking Brownian motion through video microscopy (2.11)

Student's Manual	This experiment is designed to study the Brownian motion of colloidal particles suspended in water, air or any other solvent.
Equipment manual	Motic BA210 Series Biological microscope Instruction Manual Motic Image Plus Version 2.0 ML Motic Live Imaging Module
Movie	Brownian Motion Movie
Matlab Code	Data extraction, Image processing and Particle locating algorithm Band pass filter function Particle locating function Centroid locating function
Sample Results	Gray scale image of microspheres executing Brownian motion Binary image showing microspheres as bright particles Bandpass filtered image with background noise removed Displacement square versus time graph of Brownian particles
Further Readings and References	"Einstein, Perrin and the reality of atoms: 1905 revisited" Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner, Am. J. Phys. 74(6), 478-481 (2006) "Concepts in Thermal Physics", Stephen J. Blundell and Katherine M. Blundell, Oxford university press, (2008), pp. 207-208, 368-384. "The time, size, viscosity, and temperature dependence of the Brownian motion of polystyrene microspheres", Dongdong Jia, Jonathan Hamilton, Lenu M. Zaman and Anura Goonewardene, Am. J. Phys. 75(2), 111-115 (2007).