Question

В чём разница между диффузией и броуновским движением?

Answer 1

Диффузия проникновение молекул(атомов) одного вещества через другие. Броуновское движение- движение частиц

Answer 2

Difference between Diffusion and Brownian Motion

Diffusion and Brownian motion are both phenomena related to the movement of particles, but they have distinct characteristics.

Diffusion refers to the process by which particles move from an area of higher concentration to an area of lower concentration. It occurs due to the random motion of particles and is driven by the concentration gradient. In diffusion, particles spread out and mix with each other until they reach a state of equilibrium. This process can occur in gases, liquids, and solids.

Brownian motion, on the other hand, specifically refers to the random motion of particles suspended in a fluid (such as gas or liquid). It was first observed by the botanist Robert Brown in 1827 when he noticed the erratic movement of pollen grains in water. Brownian motion is caused by the constant collisions between the particles and the molecules of the surrounding fluid. These collisions impart random kinetic energy to the particles, causing them to move in a zigzag pattern. Brownian motion is a fundamental concept in physics and has applications in various fields, including the study of colloids, diffusion, and statistical mechanics.

In summary, diffusion is the overall movement of particles from an area of high concentration to an area of low concentration, while Brownian motion specifically refers to the random motion of particles suspended in a fluid.