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Radius of bubble when inner bubble bursts

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In this how they have written the expression of $P_{ex}$

asked May 9, 2017 in Physics Problems by koolman (4,286 points)
what's the problem you are facing ? I see the solution is quite clear
The expression of $P_{ex}(\text{What is }R_1 ,R_2)$

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Best answer

This website explains : https://web.mst.edu/~gbert/SurfaceTension/back.htm.

The equation being quoted is the Young-Laplace Equation which relates excess pressure across a surface to the surface tension and radius of curvature. Any surface can have more than one radius of curvature. $R_1, R_2$ are the Principal Radii of Curvature in two mutually perpendicular planes. For a spherical surface $R_1=R_2$, while for a cylindrical surface $R_2=\infty$.

answered May 11, 2017 by sammy gerbil (28,876 points)
edited May 11, 2017 by sammy gerbil
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