Supplee's paradox
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(physics) A physical paradox that arises when considering the buoyant force exerted on a relativistic bullet (or in a submarine) immersed in a fluid subject to an ambient gravitational field. If a bullet has neutral buoyancy at rest in a perfect fluid and is then launched at relativistic speed, observers at rest within the fluid would conclude that the bullet should sink, since its density will increase due to the length contraction effect. On the other hand, in the bullet's proper frame it is the moving fluid that becomes denser and hence the bullet would float.
Supplee's paradox
In graduate seminars, students often debate Supplee's paradox to understand how relativistic length contraction affects buoyant force.
In graduate seminars, students often debate Supplee's paradox to understand how relativistic length contraction affects buoyant force.
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