Small particles, solid, semi-solid or liquid, suspended in the air. The diameter of the particles may vary from 100 microns down to 0.02 microns Examples are dust, smoke and fog.
References for this information:
(Visited 62 times, 1 visits today)
Small particles, solid, semi-solid or liquid, suspended in the air. The diameter of the particles may vary from 100 microns down to 0.02 microns Examples are dust, smoke and fog.