Final answer:
Anisotropy is when the properties of molecules vary depending on the direction they are observed or measured. Liquid crystals are an example of anisotropic substances.
Step-by-step explanation:
Anisotropy refers to an arrangement of molecules in which their properties depend on the direction they are measured. This means that the properties of the molecules vary depending on the direction in which they are observed or measured.
For example, liquid crystals are anisotropic because their molecules are rod-like and show orientational (nematic) order. This means that the properties of liquid crystals, such as their optical behavior or conductivity, can differ depending on the direction in which they are observed or measured.