Dear Hanna Edwards . See the following useful RG links: Article Why history matters: Ab initio rederivation of Fresnel equat...
https://arxiv.org/pdf/1705.11004
https://ieeexplore.ieee.org/iel5/5/31356/01457646.pdf
https://www.electrical4u.com/fresnel-equations/
Thank you for replying but this misses my question . I did not ask for a derivation of the Fresnel Equations but the Fresnel DRAG formula aka Fresnel drag coefficient (1-1/n^2) - which is about the motion of an optical guide through which a signal travels and its consequent impact on the (therefore altered) speed of propagation of the signal through the medium . I could not find anything in the internet !!
I will come back about a point this article raises perhaps another day if i live long enough . But first things first . A house must be built from the base up .
Thank you so much Joern ! How did you find this ? Do you know the source of these pages ?
And how do you think did Fresnel come to his key assumption of the square of the refractive index being proportional to the etherdensity ? Why the SQUARE ?
I mean he didn't even know about the permeability and permittivity of free space back then ?
Because if we are relating the permeability and permitivity of an optic medium to that of free space - that's n^2=c^2/c_n^2=u_ne_n/u_0e_0 - right ? I mean that's right by definition - right ?
Wow ... i still need to understand this physically ... i.e. where is my physical thinking going wrong THEN when i for a second time here derive (1-1/n) ? Please see attached if you care to help me understand this topic physically .
Jörn Schliewe I got it ! I found my mistake ! The extra part of ether density is described by (mu*e)-(mu_o*e_o) NOT by n-1 !!!
And (mu*e)-(mu_o*e_o) = (mu_o*e_o)*(n^2-1)
THANK YOU SO MUCH
I think Fresnel must have been one of the greatest man that ever lived to have seen what he saw at his time .
Dear Hanna Edwards
the source is a very readable book. See attachment.
Best regards
Jörn
I don't really know how to thank you enough . How did you find it ? And then you even found me the right pages ? How did you know the pages were in there - so it is the pages you must have somehow found and the book through them ? Why are you doing this for me ? Very muchas gracias mate !
Hi Hanna,
I once found this book and read it at once like a novel. I liked the preEinstein-view on Electromagnetism.
I just searched for the Fresnel chapter to find the pages.
Finally, I like your passion for physics and I‘m glad if I can support you a little bit.
Best regards
Jörn
Is this book online or did you take pictures of your hardcopy for me ?
https://en.m.wikipedia.org/wiki/File:A_history_of_the_theories_of_aether_and_electricity._Whittacker_E.T._(1910).pdf
thanks - i downloaded it
i will get to this topic after publishing my experimental results
i decided after all as there is a lot more to this drag effect but i realised i can simply show in my paper how a drag effect like fresnel's (which must exist if there is absolute motion which is my hypothesis) would make no measureable difference to "my" experiment
Dear Hanna Edwards,
On June 1 The Astrophysical Journal Letters published a paper from Jeremy Darling with results that were obtained with the help of radio waves: “The Universe is Brighter in the Direction of Our Motion: Galaxy Counts and Fluxes are Consistent with the CMB Dipole” (https://iopscience.iop.org/article/10.3847/2041-8213/ac6f08).
The confirmation of the origin of the CMBR dipole by another type of observations can only be interpreted as the proof that absolute motion and absolute space are real.
With kind regards, Sydney
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