what is capillarity inversion?

Question

capillarity inversion is a topic related with FLUID STASTICS.
OUR SIR GAVE US THIS AS ASSIGNMENT AND WOULD BE GIVING MARKS FOR THAT.

Answer 1

Take a thin tube. Put the open end halfway into a beaker of water. You'll see that the water level in the tube will rise to a level higher than the beaker itself. In this case the water is the wetting fluid and air the non-wetting fluid.

If for any reason the water levels drops below that in the beaker the air is the wetting fluid and oil the non-wetting fluid. This is capillary inversion: When the wetting fluid in a system "flips".