Q.what is emulsion? ans) ''If a mixture two partially miscible or immiscible liquids is shaken, a coarse dispersion of one liquid in the other is obtained which is called emulsion'' (Nexus Boys)
To mix things that wouldn't otherwise mix -- such as an insoluble solid in a liquid, or two liquid that do not mix (like oil and water). The purpose depends on what you want it for! For instance,...