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Brownian Motion


Brownian Motion

Logo for Brownian Motion
Applet clearly demonstrates Brownian motion in two dimensions. The small particles are shown as well as the large particle.
Material Type: Simulation
Date Added to MERLOT: May 11, 2000
Date Modified in MERLOT: June 09, 2005
Submitter: John Walkup


  • Reviewed by members of Editorial board for inclusion in MERLOT.
    Editor Review
    Very good quality; in queue to be peer reviewed
    avg: 5 rating
  • User review 4 average rating
  • User Rating: 4 user rating
  • Discussion (2 Comments)
  • Learning Exercises (none)
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Primary Audience: College General Ed
Mobile Compatibility: Not specified at this time
Language: English
Cost Involved: no
Source Code Available: no
Accessiblity Information Available: no
Creative Commons: unsure


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Discussion for Brownian Motion

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Avatar for Barbra Bied Sperling
14 years ago

Barbra Bied Sperling (Staff)


I spent about 30 minutes trying different things with this item. I like it a lot -- it is simple, but very
effective in illustrating the phenomenon of Brownian motion, as well as effects of interatomic collisions. The
ability to slow the atoms down and to change the mass ratio is quite revealing. The only problem
I discovered is that it displays very bad physics at mass ratios near 1.0 -- the red particle seems to gain energy
with every collision, and is soon is whipping around at speeds much higher than the other particles.

It would have been nice had the author told us what force model is being used; it is not a hard sphere force.

Avatar for John Walkup
15 years ago

John Walkup (Staff)


Technical Remarks: