Is Planck's constant the key to understanding a quantum?

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    Definition Quantum
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Discussion Overview

The discussion revolves around the definition of a "quantum" in physics, exploring its implications and the relationship with Planck's constant. Participants examine whether "quantum" is a noun or an adjective, and how this affects its understanding in the context of quantum mechanics.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Meta-discussion

Main Points Raised

  • Some participants argue that "quantum" is an adjective, suggesting that a universal definition of "a quantum" is elusive.
  • Others provide definitions from dictionaries, indicating that "quantum" can refer to the smallest amount of a physical quantity that can exist independently.
  • One participant proposes that "quantum" implies a "step change," emphasizing the discrete nature of quantum phenomena.
  • Another participant contends that a photon is emitted when an electron drops to a lower energy level, challenging the idea of a "top step" in energy levels.
  • Some participants emphasize that learning definitions alone may not enhance understanding of physics, suggesting a focus on physical intuition instead.
  • A later reply cites a definition from Wikipedia, describing a quantum as the minimum unit of any physical entity involved in an interaction, and discusses the quantization of energy.

Areas of Agreement / Disagreement

Participants express differing views on the definition and implications of "quantum," with no consensus reached on a singular definition. There are competing interpretations regarding the nature of photons and energy levels.

Contextual Notes

Some definitions and interpretations presented are dependent on specific contexts and may not be universally accepted. The discussion reflects varying levels of familiarity with quantum mechanics and its terminology.

  • #61
Born2bwire said:
Once again, you need to look up and learn what Lagrangian mechanics, path integral, and the action are if you are going to start asking questions based on assumptions of their character.

Can you please tell me whether my definition of action in post #1 is correct or not.
 

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