question of brownian motion

[mamibrkly]

a lil help please... how did brownian motion provide evidence for the existence of atoms?

[5614]

In Brownian motion you see a particle move in loads of random different directions, as if it were continually being hit by loads of little things.

 

What could provide all of these little collisions? Atoms.

[Ti]

Did they tried it in a vacuum?

[lucaspa]

Did they tried it in a vacuum?

 

If you have a vacuum, then you don't have any atoms or particles. Including the particle you are looking at!

 

many of the original experiments were done with light particles on water. If you in vacuum, no water.

[Ti]

Well the system are well control right? Not the subject itself. The external surrounding! You know to rule out external forces. Who know, you maybe breathing on the subject to cause its motion. But remembered to bring breathing masks. Hehehe.