Question

Explain angle of contact with diagram.​

Answer 1

Explanation:

The angle which the tangent make to the free surface of the liquid at the point of contact with the walls of the vessel inside the liquid is called the angle of contact, or it is defined as the angle subtended between the tangents drawn at the liquid surface and the solid surface inside the liquid at the point of contact is called the angle of contact (θ).

Answer 2

The angle of contact is the angle made by the tangent to the liquid surface at the point of contact with the solid surface inside the liquid. ★ for liquids which wet the surface ϴ<90°. ★ for mercury on clean glass ϴ≈135°.