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When two soap bubbles of radius r(1) " a...

When two soap bubbles of radius `r_(1) " and " r_(2)(r_(2) gt r_(1))` coalesce, the radius of curvature of common surface is

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`:'r_(1)ltr_(2)`
`:.P_(1)gtR_(2)` Small portion of bubbles is in contact and in equilibrium

`P_(1)-P_(2)=(4T)/(r)implies(4T)/(r_(1))-(4T)/(r_(2))impliesr=(r_(1)r_(2))/(r_(2)-r_(1))`
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