Position-Momentum Uncertainty Principle

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SUMMARY

The Position-Momentum Uncertainty Principle asserts that there is inherent uncertainty in measuring the position and momentum of particles. In practical applications involving elementary particles, the mass is typically known with high accuracy, which implies that the uncertainty in momentum directly translates to uncertainty in velocity. Therefore, discussions around uncertainty primarily focus on velocity rather than mass.

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relativityfan
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hi,

in the position momentum uncertainty principe , should we believe there is an uncertainty about the mass and not only about the velocity?

thank you very much for your reply!
 
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As a practical matter, when dealing with elementary particles, the mass is known to a high degree of accuracy, so the uncertainty in momentum means uncertainty in velocity.
 

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