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Heisenberg's Uncertainty Principle

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

Definition

Heisenberg's Uncertainty Principle states that it is impossible to know both the exact position and momentum of a subatomic particle simultaneously. This principle introduces inherent uncertainty into our measurements.

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