What Does Gravity Have To Do WithThe Expanding Universe?

[Haipule]

Why do some physicists think that there may be a "graviton" particle through which gravity operates? If gravity is explained as a curvature of spacetime, what function would a particle have? Just curious.

That is trickier to answer, but the essence is that the *way* gravity is described mathematically in general relativity is best described quantum mechanically by a spin 2 particle when things are quantized. In essence, the interaction with that spin 2 particle is equivalent to the interaction with curved spacetime mathematically.

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Can I use phonons to effect magnetism? This is difficult to study because of magnets in speakers. Any help would be appreciated. And should it be ultra(VHF, UHF) or infrasonic? I'm in way over my head!

First,

phononts=sound
photons=light

Yes, light (photons) is an electromagnetic wave, so light does, in fact, change the magnetic field. But the frequency is *very* high:on the order of 10^16 Hz for ordinary light. Also, the amount of change to the magnetic field tends to be small unless the light is of very high intensity. Even then, the electric forces will cause more effects than the magnetic because of the relative sizes of the two.

If you really are asking about phonons (sound), then the effects are different. if you can get the wavelength of the sound and the wavelength of the light (typically radio frequencies), then there can be a resonant effect. But you need a material that interacts strongly with the light (radio) as well as having the right wavelength of sound.

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Was spacetime ever curved? Light (photons, energy) curves when it comes within the vicinity of a body of matter. But in the beginning there was no matter, ergo, no gravity until  recombination.  Wouldn't that make spacetime/energy that isn't within the vicinity of a body of matter linear rather than curved and that would also account for acceleration.

The universe doesn't orbit around a center like matter does. It just moves outward

First, both mass and energy produce gravitational effects. So yes, there was gravity before recombination, but it was due to radiation, not matter.

Second, the universe is NOT moving outward from a center either. Or, equivalently, ALL points in space can be thought of as 'the center'.

Yes, I was talking about sound. Apparently, my question is more complex than I thought. But, is it?  Let me rephrase my question, can dielectric acceleration simply explain all the "gravity" is supposed to be? Yes, or no, is fine. Fuck Gravity! Fuck Newton, Fuck Eisenstein! I'm a big Tesla fan!