Here are some more thoughts on the double slit experiment.
Using the EVA equation and setting the value of “c” at 1, and the speed of light in water (RI:1.33) as 0.75, observers travelling at different speeds relative to the light measure different combined speeds. Thus the constancy of the speed of light is lost once light is not travelling in a vacuum.
However, Kirby Gillis (Science a Go Go) pointed out that if 0.75 is taken as the maximum speed of light in that medium, and the speed of light in the EVA equation is set at 0.75, then the constancy of the measurement of the speed of light returns.
I find myself wondering if this is just a mathematical oddity, or if some significance can be attached to it. For example, light travelling at “c” is, in its own F of R, everywhere at once; there is no time dimension. Could it be that light that appears, to an outside observer, to be travelling at 0.75c (or any other sub-c speed, depending on the medium) is still everywhere at once in its own F of R?
Let’s take this a step further out of the box. Perhaps light, in its own F of R, is not subject to time, because, in its own F of R it is always travelling at “c”. If this is the case, photons passing singly through a double slit set-up are doing so at different times only in the F of R of the experimenter. In their own F of R there is no time difference, thus, the interference pattern found in single photon experiments is no longer a surprise. All that remains is to work out why observation destroys the interference pattern.