What is the definition of "diffusion"?

2 Answers
Apr 11, 2017

Transport from high concentration zone to low concentration zone.


Diffusion is a transport phenomenon tend to cause movement of molecules, substances, etc. from regions of high concentrations to regions of low concentrations.


See below.


  • Diffusion can be defined as the net downward movement of given substance like ions from higher concentration to an area of lower concentration.
  • It can occur in any medium.
  • The diffusing particle can be solid liquid or gas.
  • The presence of semipermeable membrane is not required.