Question

With the help of a neat diagram, define angle of contact and hence give the relation between

the three interfacial tensions at all the three interfaces via liquid-air, solid-air and solid-liquid

(i.e. Sla, Ssa &Ssl
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Answer 1

Answer:

this portion answer the spa

Answer 2

Answer:

The figure represents a fluid in contact with solid glass. The liquid wets the solid and as such the angle of contact  i.e. the angle between the surface of the solid and the tangent drawn to the free surface of the liquid at the point of contact  , is acute.