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Assignment sample solution of PHYS303 - Quantum Physics

Assessment Task: Wave-Particle Duality

Describe the concept of wave-particle duality and explain how the double-slit experiment demonstrates this principle.

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Physics Assignment Sample

Q1:

Answer :

1. Wave-Particle Duality:
Wave-particle duality refers to the dual nature of matter and light, which exhibit both wave-like and particle-like properties. This principle is a cornerstone of quantum mechanics.

2. Double-Slit Experiment:

  • In the experiment, a beam of light or electrons is directed at a barrier with two slits.
  • When both slits are open and no measurement is made, an interference pattern forms on the screen, indicating wave-like behavior.
  • However, when particles are observed passing through the slits, they behave like discrete particles, and the interference pattern disappears.

Conclusion:
The double-slit experiment highlights that particles such as electrons exhibit wave-like behaviour when unobserved and particle-like behavior when observed, proving wave-particle duality.