Two separate air bubbles (radii 0.002 cm and 0.004 cm) formed of the same liquid (surface tension 0.070 N/m) come together to form a double bubble. Radius of curvature of the internal film surface common to both the bubble is concave towards the smaller bubble. Find the radius (in mm) of the internal film surface common to both the bubbles.

Two separate air bubbles (radii 0.002 cm and 0.004 cm) formed of the s

1.	Two separate air bubbles (radii 0.002 cm and 0.004 cm) formed of the same liquid (surface tension 0.070 N/m) come together to form a double bubble. Radius of curvature of the internal film surface common to both the bubble is concave towards the smaller bubble. Find the radius (in mm) of the internal film surface common to both the bubbles.
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