Brownian motion has to do with the
A)size of atoms.
B)atomic vibrations.
C)first direct measurement of atomic motion.
D)random motions of atoms and molecules.
E)rhythmic movements of atoms in a liquid.

Question

Quizplus · Accepted Answer

Brownian motion refers to the random, unpredictable movements of atoms and molecules, which were first observed by Robert Brown in 1827. It is caused by collisions between the particles and their surrounding medium, such as a gas or liquid. The size of atoms (A) and their vibrations (B) are related but do not fully encapsulate the concept of Brownian motion. The first direct measurement of atomic motion (C) was made using a technique called optical tweezers, but this is not the definition of Brownian motion. The rhythmic movements of atoms in a liquid (E) do not accurately describe Brownian motion, as the movements are random rather than rhythmic.

Brownian Motion Has to Do with the