Does a moving particle count as a wave?

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TL;DR
I am not talking about quantum mechanics
According to the definition of a wave from Wikipedia:
A wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities.


Now, imagine a particle as a disturbance in mass density that propagates through space and time. From this perspective, I cannot think of a single reason why this could not be interpreted as a wave.
 
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A classical particle won't diffract when passing through a slit. In particular, it will not pass through a slit that is narrower than the particle, whereas a wave would pass something through.
 
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far far away said:
Now, imagine a particle as a disturbance in mass density that propagates through space and time.
What equilibrium is being disturbed here? Non-uniform mass distributions can be in equilibrium, so changing the mass distribution is not necessarily disturbing an equilibrium.
 
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far far away said:
TL;DR: I am not talking about quantum mechanics

From this perspective, I cannot think of a single reason why this could not be interpreted as a wave.
This way any change can be interpreted as a wave. It would be so general that it would be a useless terminology.
 
far far away said:
TL;DR: I am not talking about quantum mechanics

According to the definition of a wave from Wikipedia:
A wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities.
So I googled "What is a wave?" and this is what I got. If you go by this more complete AI overview and not by what Wikipedia says, your question is answered.

Screen Shot 2026-04-08 at 8.00.53 AM.webp
 
A moving particle is not a wave; a particle is just a particle. A wave is a state exhibited by a particle when it loses the structure that sustains its condensed form. Scattered photons with depleted energy give rise to energy waves.
 
jingcai said:
A wave is a state exhibited by a particle when it loses the structure that sustains its condensed form.
I don't know what that means.

For example, an ice cube is a collection of water molecules in "condensed form." If I add enough heat to un-sustain the condensed form by converting the ice cube into steam, do the free H2O molecules constitute a wave?

I am sure you will say no, so let's take this further. I can un-sustain the "condensed form" of a water molecule further by zapping it with an electrical discharge to get a H+ ion and a OH- ion. Is that a wave? Do I need to un-sustain the condensed form of the proton (H+) into quarks to get a wave?

You see where this is going.
 
far far away said:
According to the definition of a wave from Wikipedia:
A wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities.
The first word of the next sentence of the article is "periodic". I guess what you are implying/asking is whether a wave can be non-periodic/oscillating. I don't think so.
 

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