A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Astronomy Misc
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Einstein's Idiotic Variation of the Speed of Light



 
 
Thread Tools Display Modes
  #1  
Old April 4th 17, 11:42 PM posted to sci.astro
Pentcho Valev
external usenet poster
 
Posts: 8,078
Default Einstein's Idiotic Variation of the Speed of Light

Einstein's general relativity is analogous to the empirical models defined he

http://collum.chem.cornell.edu/docum...ve_Fitting.pdf
"The objective of curve fitting is to theoretically describe experimental data with a model (function or equation) and to find the parameters associated with this model. Models of primary importance to us are mechanistic models. Mechanistic models are specifically formulated to provide insight into a chemical, biological, or physical process that is thought to govern the phenomenon under study. Parameters derived from mechanistic models are quantitative estimates of real system properties (rate constants, dissociation constants, catalytic velocities etc.). It is important to distinguish mechanistic models from empirical models that are mathematical functions formulated to fit a particular curve but whose parameters do not necessarily correspond to a biological, chemical or physical property."

Accordingly, some of the quantities in general relativity are parameters that "do not necessarily correspond to a biological, chemical or physical property". So is the speed in light in a gravitational field. According to Einstein, when a massive body emits light, this light is initially subluminal - its speed is lower than c (idiotic isn't it). Then the speed of light increases with distance and becomes c in the end (idiotic isn't it):

https://m.youtube.com/watch?v=5hSTBY9-jLc
Relativity 3 gravity and light

Pentcho Valev
  #2  
Old April 5th 17, 08:23 AM posted to sci.astro
Pentcho Valev
external usenet poster
 
Posts: 8,078
Default Einstein's Idiotic Variation of the Speed of Light

In order to make general relativity's equations agree with both the nonexistent gravitational time dilation and the gravitational redshift, Einstein and his mathematical friends introduced a particularly idiotic fudge factor: The speed of light falling towards the source of gravity DECREASES - in the gravitational field of the Earth the acceleration of falling photons is NEGATIVE, -2g:

https://archive.is/wn4PV
Albert Einstein: "Second, this consequence shows that the law of the constancy of the speed of light no longer holds, according to the general theory of relativity, in spaces that have gravitational fields. As a simple geometric consideration shows, the curvature of light rays occurs only in spaces where the speed of light is spatially variable."

https://www.youtube.com/watch?v=FJ2SVPahBzg
"The change in speed of light with change in height is dc/dh=g/c."

http://www.physlink.com/Education/AskExperts/ae13.cfm
"Contrary to intuition, the speed of light (properly defined) decreases as the black hole is approached."

http://www.speed-light.info/speed_of_light_variable.htm
"Einstein wrote this paper in 1911 in German. (...) ...you will find in section 3 of that paper Einstein's derivation of the variable speed of light in a gravitational potential, eqn (3). The result is: c'=c0(1+φ/c^2) where φ is the gravitational potential relative to the point where the speed of light c0 is measured. Simply put: Light appears to travel slower in stronger gravitational fields (near bigger mass). (...) You can find a more sophisticated derivation later by Einstein (1955) from the full theory of general relativity in the weak field approximation. (...) Namely the 1955 approximation shows a variation in km/sec twice as much as first predicted in 1911."

http://www.mathpages.com/rr/s6-01/6-01.htm
"Specifically, Einstein wrote in 1911 that the speed of light at a place with the gravitational potential φ would be c(1+φ/c^2), where c is the nominal speed of light in the absence of gravity. In geometrical units we define c=1, so Einstein's 1911 formula can be written simply as c'=1+φ. However, this formula for the speed of light (not to mention this whole approach to gravity) turned out to be incorrect, as Einstein realized during the years leading up to 1915 and the completion of the general theory. (...) ...we have c_r =1+2φ, which corresponds to Einstein's 1911 equation, except that we have a factor of 2 instead of 1 on the potential term."

The speed of light does vary in a gravitational field but not in accordance with Einstein's fudge factor. It varies like the speed of ordinary falling bodies (in the gravitational field of the Earth the acceleration of falling photons is g), as predicted by Newton's emission theory of light:

https://courses.physics.illinois.edu...e13/L13r..html
University of Illinois at Urbana-Champaign: "Consider a falling object. ITS SPEED INCREASES AS IT IS FALLING. Hence, if we were to associate a frequency with that object the frequency should increase accordingly as it falls to earth. Because of the equivalence between gravitational and inertial mass, WE SHOULD OBSERVE THE SAME EFFECT FOR LIGHT. So lets shine a light beam from the top of a very tall building. If we can measure the frequency shift as the light beam descends the building, we should be able to discern how gravity affects a falling light beam. This was done by Pound and Rebka in 1960. They shone a light from the top of the Jefferson tower at Harvard and measured the frequency shift. The frequency shift was tiny but in agreement with the theoretical prediction. Consider a light beam that is travelling away from a gravitational field. Its frequency should shift to lower values.. This is known as the gravitational red shift of light."

http://www.einstein-online.info/spot...t_white_dwarfs
Albert Einstein Institute: "One of the three classical tests for general relativity is the gravitational redshift of light or other forms of electromagnetic radiation. However, in contrast to the other two tests - the gravitational deflection of light and the relativistic perihelion shift -, you do not need general relativity to derive the correct prediction for the gravitational redshift. A combination of Newtonian gravity, a particle theory of light, and the weak equivalence principle (gravitating mass equals inertial mass) suffices. [...] The gravitational redshift was first measured on earth in 1960-65 by Pound, Rebka, and Snider at Harvard University..."

Pentcho Valev
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
The Idiotic Consequences of Einstein's Light Postulate Pentcho Valev Astronomy Misc 1 June 18th 16 09:25 AM
Absurd Variation of the Speed of Light in General Relativity Pentcho Valev Astronomy Misc 3 April 29th 16 12:30 AM
IDIOTIC VARIATION OF THE SPEED OF LIGHT IN EINSTEIN'S RELATIVITY Pentcho Valev Astronomy Misc 3 June 16th 15 04:35 PM
ONE-WAY SPEED OF LIGHT VARIATION Pentcho Valev Astronomy Misc 0 September 18th 13 02:44 PM
THE NEW EINSTEIN AND THE SPEED OF LIGHT Pentcho Valev Astronomy Misc 1 August 21st 13 11:33 AM


All times are GMT +1. The time now is 10:18 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.