The contact angle is the angle formed between a liquid droplet and the solid surface it rests on, measuring how well the liquid wets the surface. It provides insight into the wettability of the surface, which is influenced by the balance of cohesive forces within the liquid and adhesive forces between the liquid and solid. A lower contact angle indicates better wettability, while a higher angle suggests limited wetting and greater surface energy.
congrats on reading the definition of Contact Angle. now let's actually learn it.