Can someone explain 'simply' what Particle theory and Brownian motion are.

Question

I'm finding alot of websites hard to understand. Thanks

Answer 1

As a non-scientist, I found these explanations easy to understand.

http://www.le.ac.uk/se/centres/sci/selfstudy/particle01.html

http://www.ms.uky.edu/~mai/java/stat/brmo.html