Liquid rises to a height of 2 cm in a capillary tube and the angle of contact between the solid and the liquid is zero. If the tube is depressed more now, so that top of capillary is only 1 cm above the liquid, then the apparent angle of contact between the solid and the liquid is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
If a liquid can rise to a height h, but the tube has insufficient height 
, then the angle of contact increases from 
to 
given by 
Here, 
or 
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