Each pollen grain was being unequally bombarded by the water molecules in motion. This causes the pollen grains to 'random walk' on the surface of the water.

*expected*to end on. This expected distance is computed from d = L√n where L is the average step length and n is the number of steps per walk. In this project, L = 3. The closer the circles, the closer the agreement between theory and experiment.

The
project can be viewed and downloaded by clicking on the link below the graphic.

https://scratch.mit.edu/projects/52984710/

This
project is the 2-dimensional version of my 1-dimensional project, Feynman's
Random Walk, that can be viewed at https://scratch.mit.edu/projects/11282377/.

The Scratch blog post can be seen by clicking on this link.

A free PDF document that describes Brownian Motion in more detail and explains the coding can be had by sending an email request to grandadscience@gmail.com.
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