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dchin's picture

Beads

Submitted by dchin on Wed, 09/30/2009 - 1:57pm.

Debbi and Janice

We conducted two trials for each bead measurement of 2, 4, and 8 microns, observing each for two minutes at a time. The first time we observed the 2 micron beads, there were 26 units of movement, meaning that it moved 65.0 microns. The second time we observed it, there were 17 units of movement, meaning that it moved 42.5 microns. The first time we observed the 4 micron beads, there were 16 units of movement, meaning that it moved 40.0 microns. The second time that we observed it, there were 8 units of movement, meaning that it moved 20.0 microns. The first time we observed the 8 micron beads, there were 10 units of movement, meaning that it moved 25.0 microns. The second time that we observed it, there were 5 units of movement, meaning that it moved 12.5 microns.

Our observations were consistent with Einstein's theory. The amount of movement decreased as the molecules got bigger. We attribute the decrease in movement between the first and second trials to the cooling of the water.

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