diffusivity

Diffusivity is a measure of how easily particles, molecules, or substances spread out through a medium, such as air, water, or a solid. It quantifies the rate at which these particles move from areas of higher concentration to lower concentration, driven by random motion. Higher diffusivity means particles spread quickly, while lower diffusivity indicates slower movement. This concept helps us understand processes like how odors disperse in a room, how nutrients move through cells, or how pollutants spread in the environment. Overall, diffusivity describes the inherent ability of a substance to diffuse within its surroundings.