Explanation

An emulsion is a colloidal dispersion of one liquid as droplets in another immiscible liquid — for example, oil dispersed in water (as in milk) or water dispersed in oil (as in butter). It is therefore a liquid–liquid system. Solid–liquid, liquid–gas and solid–solid dispersions are respectively suspensions/sols, foams and solid composites, not emulsions. An emulsion is a liquid dispersed in liquid.