Question

What Is Mean By angle Of Contact ???​

Answer 1

Answer:

Angle of contact is the angle between the tangent drawn to the meniscus of the liquid at the point of contact with the surface of the vessel or container

Answer 2

Answer:

The angle between the meniscus and the containing walls of a column of liquid measured from the vertical wall below the surface of the liquid to the position of the tangent to the meniscus at its point of contact with the wall

The angle of contact is constant for a specific pair of solid and liquid.