Question

Define angle of contact / facter affecting it​

Answer 1

Answer:

The contact angle is the angle, conventionally measured through the liquid, where a liquid–vapor interface meets a solid surface. It quantifies the wettability of a solid surface by a liquid via the Young equation.

Factors affecting angle of contact: When a liquid comes in contact with a solid surface it is generally curved at the point of contact. If the liquid is not pure and the surface of solid is not clean, then angle of contact will change. The angle of contact between pure water and clean glass is nearly zero