Angle ?Capillary Tube - Jurin's Law
 A capillary tube (from the Latin capillus: hair) is a tube with a small internal diameter.The same junction angle is found at the free surface of a liquid near the edges of the container 
and causes the formation of a meniscus in tubes.of Liquid/Solid Junction
 A droplet of liquid placed on a flat, horizontal solid surface can:
o Either spread widely (for example, water on clean glass); in this case, the liquid 
perfectly wets the solid, and the junction angle ?is 0?.