Brownian Motion Concept

Demonstrations in Brownian Motion

Top: Full apparatus setup showing smoke generator (dark canister, left), microscope with smoke cell on stage, and video camera mounted on a vertical rod looking down the ocular tube, on a lecture bench. Bottom: Close-up of the smoke cell clamped to the microscope stage with pinch clamps on tubing.
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Brownian Motion

Smoke particles in a sealed cell display continuous random jittering from collisions with air molecules, providing direct visual evidence for kinetic molecular theory. Students observe that thermal motion is perpetual …
Overhead view of molecular motion demonstrator: transparent square frame with corner clamps on a white glass plate, containing a large red disk surrounded by smaller blue and green spheres, several blurred from motion

Brownian Motion Model

Models Brownian motion using a mechanically agitated platform: small spheres (gas molecules) randomly collide with a larger disk (dust particle), producing visible jittering motion. Demonstrates that random molecular collisions produce …