Brownian Motion Flashcards

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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.

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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.

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3
Q

What is the cause for Brownian motion?

A

The randomly moving air particles were hitting the smoke particles unevenly, causing this motions.

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4
Q

What is Brownian motion evidence for?

A

Existence of atoms or molecules in the air.

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