Brownian Motion Flashcards
1
Q
How was Brownian motion first seen?
A
Robert Brown noticed tiny particles of pollen suspended in water moved with a zigzag, random motion.
2
Q
How can Brownian motion be seen in the lab?
A
1) Put some smoke in a brightly illuminated glass jar and observe the particles using a microscope.
2) The smoke particles appear as bright specks moving haphazardly from side to side, and up and down.
3
Q
What is the cause for Brownian motion?
A
The randomly moving air particles were hitting the smoke particles unevenly, causing this motions.
4
Q
What is Brownian motion evidence for?
A
Existence of atoms or molecules in the air.
