Is Light a Particle or a Wave in Different Contexts?

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    Light Particle Wave
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Discussion Overview

The discussion centers around the nature of light, specifically whether it should be classified as a particle or a wave. Participants explore the context-dependent nature of this classification, considering factors such as the relative size of the system in question.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that the classification of light as a particle or wave is relative and depends on the size of the system being considered.
  • Others argue that framing the question as an absolute choice between particle or wave is misguided, suggesting that light can be viewed as both simultaneously.
  • One participant emphasizes that while light can exhibit wave-like or particle-like properties, it is fundamentally a quantum object that does not fit neatly into either category.
  • Some responses reiterate the idea that the context may influence which properties of light are more useful to consider, but do not resolve the question of its nature.

Areas of Agreement / Disagreement

Participants express differing views on whether light should be classified as a particle or a wave, with no consensus reached on the matter. Some maintain that it is context-dependent, while others challenge the premise of the question itself.

Contextual Notes

Participants reference the complexity of light's behavior and its classification as a quantum object, indicating that the discussion may involve unresolved assumptions about measurement and context.

qnach
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Is "a light, particle or wave" an absolute question or a relative question?
Should a light be considered as a particle or as a wave depends upon the relative size of the system?

When considering a visible light relative to a basket ball should it be considered as particle, while
a visible light relative to an atom be considered as a wave?
 
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qnach said:
Is "a light, particle or wave" an absolute question or a relative question?

Neither. It's a misguided question, which assumes that light must be one or the other.

qnach said:
Should a light be considered as a particle or as a wave depends upon the relative size of the system?

No. See above.

qnach said:
When considering a visible light relative to a basket ball should it be considered as particle, while
a visible light relative to an atom be considered as a wave?

No. See above.
 
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PeterDonis said:
Neither. It's a misguided question, which assumes that light must be one or the other.
Just to expand to help the OP, light, at all times, can be considered both a wave and a particle. In fact, as you will see on the linked page, matter is also both a wave and a particle. It is true, however, that it is sometimes more useful to think of light as either a particle or a wave, but that does not change the fact that it is both. It is just that in some situations, it is important to either focus on light's wave- or particle-like properties.
 
qnach said:
Is "a light, particle or wave" an absolute question or a relative question?
Should a light be considered as a particle or as a wave depends upon the relative size of the system?

When considering a visible light relative to a basket ball should it be considered as particle, while
a visible light relative to an atom be considered as a wave?

This link gives you the FAQ that we get in this forum all the time:

https://www.physicsforums.com/threads/physics-faq-list.855542/

You will find an entry for this question there.

Zz.
 
Isaac0427 said:
Just to expand to help the OP, light, at all times, can be considered both a wave and a particle. In fact, as you will see on the linked page, matter is also both a wave and a particle. It is true, however, that it is sometimes more useful to think of light as either a particle or a wave, but that does not change the fact that it is both. It is just that in some situations, it is important to either focus on light's wave- or particle-like properties.
Actually, that's the best way to express it. It's a quantum object. It will ACT like a wave if you measure for wave-like characteristics, and it will ACT like a particle if you measure for particle-like characteristics, but that does not make it a wave or a particle; it is distinct from both.
 

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