A quick theoretical question on dark matter

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Discussion Overview

The discussion centers around the theoretical nature of dark matter and its potential characteristics, specifically whether dark matter could be considered a form of ionized matter. Participants explore the implications of dark matter's inability to emit light and its interactions with other forms of matter.

Discussion Character

  • Theoretical exploration
  • Debate/contested

Main Points Raised

  • One participant suggests that since dark matter cannot emit light, it might be possible for it to be ionized matter, questioning the necessity of electrons for light emission.
  • Another participant counters that charged particles, such as ions, are required to interact with light, implying that if dark matter were charged, it would have been detected by now.
  • A different participant emphasizes that ionized matter, by definition, has charge and would emit electromagnetic radiation under certain conditions, challenging the idea that dark matter could be ionized matter.
  • Another participant states that dark matter does not interact with other matter except through gravity, suggesting that it does not clump with matter, which would be inconsistent with it being ionized matter.
  • One participant clarifies that while fully ionized plasma does not emit atomic line radiation, it can still emit other forms of radiation and interact with light, arguing against the notion that it could be invisible.

Areas of Agreement / Disagreement

Participants express differing views on the nature of dark matter and its potential classification as ionized matter. There is no consensus on whether dark matter could be considered a form of ionized matter, and multiple competing perspectives remain unresolved.

Contextual Notes

Some claims rely on specific definitions of ionized matter and the conditions under which charged particles emit radiation. The discussion does not resolve the implications of dark matter's interactions or the characteristics of plasma.

BadgerBadger92
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This is a theoretical question that may not be rooted in reality. I hope this was the right section. Please clear up all misunderstandings.

Since dark matter can’t emit light, could it be possible that dark matter is ionized matter? I always thought you needed electrons to emit light. Then that doesn’t answer how they don’t catch electrons.

Help would be appreciated.
 
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BadgerBadger92 said:
Since dark matter can’t emit light, could it be possible that dark matter is ionized matter? I always thought you needed electrons to emit light.
No. You need charged particles to interact with light. Ions, by definition, are charged particles.
 
BadgerBadger92 said:
This is a theoretical question that may not be rooted in reality. I hope this was the right section. Please clear up all misunderstandings.

Since dark matter can’t emit light, could it be possible that dark matter is ionized matter? I always thought you needed electrons to emit light. Then that doesn’t answer how they don’t catch electrons.

Help would be appreciated.

But "ionized matter" means that it has CHARGE. And charged entities tend to emit EM radiation, especially when they go through varying fields. If dark matter has charge, it would have been easily detected by now.

And no, your notion that you "needed electrons to emit light" is false. I could have just protons and jiggle them up and down and I can create EM radiation. I don't need any stinking electrons there.

Zz.
 
Not only does DM not emit light, it doesn't even interact with other matter, except via gravity. They pass right through each other, which is why we don't find all sorts of bodies with DM as a component. DM doesn't clump with matter.

No ions are going to do that.
 
Ionized matter is plasma, and plasmas are certainly not dark. Fully ionized plasma will not emit atomic line radiation, but it will still emit free-free bremsstrahlung, and if there is a magnetic field, then also synchrotron radiation. Also, depending on the density of the plasma, light above the plasma frequency will be reflected. Light will also be refracted or absorbed by the plasma, so it is anything but invisible.
 

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