eclipse of 1919

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jim</i>
<br />There is a paper on the web that says the data about the bending of light by the sun in the eclipse of 1919 was cooked to suit the GR theory. It is claimed the equipment that was used would not have been able to accurately measure anywhere near 1 second of arc. Does anyone know if this is true or not?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">My guess is that it is not true because the originator of that theory has not been responsive to criticism in USENET discussions and seems to believe that all of relativity is wrong, which is apparently a personal belief rather than a fact-supported conclusion. Moreover, similar experiments with similar equipment at later eclipses were successful in measuring light-bending to better than an arc second.

However, it is irrelevant to experimental science whether Eddington was right or not because modern experiments involving the Sun passing the line of sight to a quasar and spacecraft signals passing major planets now give the Einstein-predicted result to several more orders of magnitude precision. The accuracy of the 1919 eclipse is now of historical interest only. -|Tom|-

And since the result is gravity fields effect photons we can then assume (or is it measured) that gravity redshifts light? Or not?

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jim</i>
<br />And since the result is gravity fields effect photons we can then assume (or is it measured) that gravity redshifts light? Or not?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Yes, that is true. Gravitational potential (which we now identify with elysium) gets denser near masses. Denser elysium causes light to slow, bend, and redshift because the operative mechanism is refraction, not "space-time curvature"; and ordinary refraction of any waves moving into a denser medium causes those waves to slow, bend, and redshift. -|Tom|-

Is there a mathematical equation that can be used to estimate mass or redshift generated by gravity fields? Would the refaction and slowing of light in denser matter(or what ever the stuff is) be part of the same process? Refraction in glass, for example, is or is not redshift?

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jim</i>
<br />Is there a mathematical equation that can be used to estimate mass or redshift generated by gravity fields?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Yes. The bending, slowing, and redshift are all proportional to<br />1/[1-2 GM/(r c^2)]<br />where G is the universal gravitational constant, M is the mass of the source of gravity, r is the minimum distance, and c is the speed of light. This quantity plays the role of an index of refraction for light propagating in the elysium medium.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Would the refaction and slowing of light in denser matter (or what ever the stuff is) be part of the same process? Refraction in glass, for example, is or is not redshift?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Redshift or blueshift always accompanies refraction because a change in light propagation speed is what causes the bending. -|Tom|-

I learned that when light is refracted in glass color results and is always in the same frequencys of red, green, blue and violet. Is this the same effect you are saying happens in redshift?