On Friday, August 29, 2025 at 4:08:45 AM UTC-6 Alan Grayson wrote:
On Wednesday, August 27, 2025 at 1:44:04 PM UTC-6 Brent Meeker wrote: On 8/27/2025 1:16 AM, Alan Grayson wrote: Rather, I am pointing out the lack of plausibility of a model routinely offered to explain redshifting. AG How about redshift due to Doppler? Can you grasp that? Then consider a distant galaxy A and a galaxy B that is between us and A. Due to expansion of the universe we are receding rapidly from A and less rapidly from B. When a photon A emitted is received at B it's wavelength will have increased due to the Doppler shift as B recedes from A. Suppose B immediately transmits a photon of that wavelength toward Earth. It will suffer a Doppler shift of increased wavelength as received at Earth. Now just skip B. The expansion of space causes a continuous Doppler shift as a photon traverses space. Brent The problem with Doppler for photons can be summarized in a simple question most physicists can't answer, or even pose; where is the wave which the moving source allegedly interacts with to produce redshift? A photon, as JC admits, is a point particle. I claim it manifests no wave properties other than as a ensemble. The polarizer experiment given by JC just shows that photons have no polarization before measurement. AG *L*et me be more explicit; in the case of a moving train, as it recedes from the ground observer and keeps blowing its horn, due to its motion, the distance between the compression wave peaks increases, producing the equivalent of a redshift for sound. But in the case of light modeled as a photon, that is as a point particle, where its wavelength is only detectable as an ENSEMBLE, there doesn't seem to be a model for how the moving source produces the shift, red or blue. That the shift occurs is statement of faith which is confirmed by experiment, but how exactly it occurs, that is the physical mechanism, seems unknown. Moreover, in your claim about the wf of a photon, when I googled it, I found that there's controversy about what that wf actually is. If you believe it exists, please post it. TY, AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/ca1168e1-7a21-4632-9d64-dd8127ec0060n%40googlegroups.com.
