Two soap bubbles of different deameters are in contact with a certain portion common to both the bubbles. What will be the shape of the common boundary as seen from inside the smaller bubble? Support your answer with a neat diagram. Give reason for your answer.

Explanation

When seen from inside the smaller bubble the common surface will appear 2T concave as (1) the pressure (excess) = `(2T)/(R )` will be greater for concave surface & as R is small for the smaller bubble, the pressure will be greater.