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Quantum mechanics

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College Physics I – Introduction

Definition

Quantum mechanics is a fundamental theory in physics that describes the behavior of particles at atomic and subatomic scales. It explains phenomena that cannot be accounted for by classical physics.

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5 Must Know Facts For Your Next Test

  1. Quantum mechanics introduces the concept of wave-particle duality, where particles like electrons exhibit both wave-like and particle-like properties.
  2. Heisenberg's Uncertainty Principle states that it is impossible to simultaneously know both the exact position and exact momentum of a particle.
  3. The Schrödinger equation is a key mathematical equation in quantum mechanics that describes how the quantum state of a physical system changes over time.
  4. Quantum superposition allows particles to exist in multiple states or positions simultaneously until they are measured or observed.
  5. Entanglement is a phenomenon where particles become interconnected such that the state of one particle instantly influences the state of another, regardless of distance.

Review Questions

  • What does Heisenberg's Uncertainty Principle state about the measurement of a particle's position and momentum?
  • Explain the concept of wave-particle duality in quantum mechanics.
  • What role does the Schrödinger equation play in quantum mechanics?

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