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| 1. |
Angle of contact |
| Answer» The angle between tangent to the liquid surface at the point of contact and solid surface inside the liquid is said to be angle of contact. At the line of contact the surfaces force between the three medium must be in equilobrium. (If angle of contact theta < 90°→liquid drop spread over solid surface).(If angle of contact theta>90°→liquid drop will not spread over solid surface). | |