What are emulsions? What are their different types? Give an example of each type.

(N/A) An emulsion is a colloidal system in which both the dispersed phase and the dispersion medium are liquids.
There are two main types of emulsions:
$(a)$ Oil-in-water $(O/W)$ type:
In this type,oil acts as the dispersed phase and water acts as the dispersion medium. Examples include milk and vanishing cream.
$(b)$ Water-in-oil $(W/O)$ type:
In this type,water acts as the dispersed phase and oil acts as the dispersion medium. Examples include cold cream and butter.