Physics
Fluid-Mechanics
Easy

Question

Two soap bubbles with radii r1 and r2 (r1>r2) come in contact. Their common surface has a radius of curvature

  1. fraction numerator r subscript 1 plus r subscript 2 over denominator 2 end fraction
  2. fraction numerator r subscript 1 r subscript 2 over denominator r subscript 1 minus r subscript 2 end fraction
  3. fraction numerator r subscript 1 r subscript 2 over denominator r subscript 1 plus r subscript 2 end fraction
  4. square root of r subscript 1 r subscript 2 end root

The correct answer is: fraction numerator r subscript 1 r subscript 2 over denominator r subscript 1 minus r subscript 2 end fraction

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