Varying Pushing Gravity Theories

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20 years 4 months ago #11312 by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jeremy</i>
<br />In rereading parts of Pushing Gravity it impresses me the large variation in theoretical outlook between the different models presented. In general it seems that pushing theories seem to bifurcate into kinetic models (like MM) that have a sea of agents moving around like a gas and electromagnetic wave models that have either low or high frequency photons that are imparting the motive force. Is there some kind of experimentum crucis that could differentiate whether the kinetic or electromagnetic model is the correct approach?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">The primary differentiators are these:

(1) Gravity behaves as if its constituents are particles, not waves, and has no known uniquely wave properties. In contrast, light has all wave properties, but no essential particle property.

(2) From the kinetic theory of gases, the mean speed of the constituents in an aether that serves as the medium for light must be sqrt(5)/3 c. But the mean speed of gravitons must be no less than 2x10^10 c.

(3) Gravitons interact with one another through collisions (the explanation for "dark matter"), "photons" do not.

(4) Gravitons can penetrate matter easily, photons cannot. -|Tom|-

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20 years 4 months ago #11581 by Jeremy
Replied by Jeremy on topic Reply from
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">
(4) Gravitons can penetrate matter easily, photons cannot. -|Tom|-
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Are we really sure about this? I was under the impression that ultra long wavelength electromagnetic waves can penetrate the Earth at least to some degree. Can we be certain that even longer wavelengths greater than we can currently produce couldn't?

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20 years 4 months ago #11582 by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jeremy</i>
<br />

I was under the impression that ultra long wavelength electromagnetic waves can penetrate the Earth at least to some degree. Can we be certain that even longer wavelengths greater than we can currently produce couldn't?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">I should have added to my preceding list:

(5) There are too few photons in the visible universe to produce gravitational force.

Even if wavelengths comparable to Earth's diameter and larger could get through (unlikely, but possible), given that photon energy and momentum is inversely proportional to wavelength, the weakness of such long waves would make simulating gravity impossible. Their complete lack of power is one reason we still cannot detect waves that long. -|Tom|-

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