Fick's laws of diffusion

Fick's laws of diffusion describe how particles, such as molecules, spread from areas of high concentration to low concentration. The first law states that the flow rate depends on the concentration gradient—how steep the difference is between the two areas—and the material’s properties. The second law explains how this process changes over time, showing that diffusion causes the concentration to even out gradually. Together, these laws help us understand natural processes like how oxygen moves into the bloodstream or how smells disperse in the air.