- #1
hankaaron
- 83
- 4
Physicists often speak of the uncertainty principle in terms of position and velocity (in momentum). But momentum is Mass X Velocity. Why is it that we can say something like "a particle with a well defined position has high uncertainty in velocity". But I never hear a statement like "a particle with a well defined position has high uncertainty in mass"?
Is it perhaps because position and velocity are conjugate variables while position and mass are not?
Is it perhaps because position and velocity are conjugate variables while position and mass are not?