Calculateur du Principe d'Incertitude de Heisenberg Gratuit
Appliquez le principe d'incertitude de Heisenberg. Calculez l'incertitude minimale sur la position ou la quantité de mouvement.
Minimum Position Uncertainty (dx)
0.000000000527300 m
Formule
Heisenberg Uncertainty Principle
The uncertainty principle states a fundamental limit on the precision with which position and momentum can be known simultaneously.
Formula
dx * dp >= hbar / 2
where hbar = h / (2 pi) = 1.0546 x 10^-34 J s.
Given dp, the minimum dx is hbar / (2 dp). This is not a measurement limitation but a fundamental property of nature.
Exemple Résolu
An electron with dp = 1e-25 kg m/s.
- 01dx_min = hbar / (2 dp)
- 02dx_min = 1.0546e-34 / (2 * 1e-25)
- 03dx_min = 1.0546e-34 / 2e-25
- 04dx_min = 5.273e-10 m = 0.527 nm
Questions Fréquentes
Does the uncertainty principle apply to energy and time?
Yes. There is an analogous relation: dE * dt >= hbar / 2. This allows virtual particles to briefly exist with borrowed energy.
Is this uncertainty due to imperfect instruments?
No. It is an intrinsic property of quantum mechanics. Even with perfect instruments, you cannot simultaneously know both position and momentum to arbitrary precision.
Why does this not affect everyday objects?
For macroscopic objects, hbar is so tiny that the minimum uncertainty is far below any measurable threshold. Quantum effects only matter at atomic scales.
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