Question

How is the capillary effect related to the contact angle?

Answer 1

The relation between capillary effect and contact angle is explained below:

1. If the contact angle is less than $90°$ the surface becomes wet by liquid.
2. If the contact angle is greater than $90°$ the surface doesn't become wet by liquid.
3. The capillary tube will have been depressed by the liquid level.

Thus, the Capillary effect is related to contact angle.