Two soap bubbles of radii 2cm and 4cm join to form a double bubble in air, then radius of curvature of interface i

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Q. If two soap bubbles of different radii

r_{1}

and

r_{2}

(

r_{1} > r_{2}

)coalesce to form a single double bubble having a common surface, then the radius of curvature of the interface is given by

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