Brownian motion

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Prepare for the ITEC Beauty Specialist Test. Study with flashcards and multiple choice questions, with hints and explanations for each. Ace your exam!

Multiple Choice

Brownian motion

Explanation:
Brownian motion is the random, jittery movement of tiny particles suspended in a liquid, caused by innumerable collisions with fast-moving solvent molecules. The chaotic motion described here—chaotic movement of colloidal particles due to collisions with solvent particles—fits precisely because it captures that the visible jitter comes from the continual pushes of the surrounding fluid’s molecules. Other options describe different phenomena: random motion of gas molecules themselves, not a particle in a liquid; magnetic effects in colloids; and light scattering by colloids, which is a separate optical effect.

Brownian motion is the random, jittery movement of tiny particles suspended in a liquid, caused by innumerable collisions with fast-moving solvent molecules. The chaotic motion described here—chaotic movement of colloidal particles due to collisions with solvent particles—fits precisely because it captures that the visible jitter comes from the continual pushes of the surrounding fluid’s molecules.

Other options describe different phenomena: random motion of gas molecules themselves, not a particle in a liquid; magnetic effects in colloids; and light scattering by colloids, which is a separate optical effect.

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