IDNLearn.com offers a comprehensive solution for all your question and answer needs. Ask anything and get well-informed, reliable answers from our knowledgeable community members.

In surface chemistry, what does the contact angle measure?
a) The thickness of a liquid film on a surface
b) The rate of evaporation of a liquid
c) The angle formed between the tangent to the liquid surface and the solid surface at the point of contact
d) The density of a liquid on a surface