I asked
how can the "redshift" of a single photon be measured
Renormalised replied "...Very easily, with a photomultiplier tube and in exactly the same way as you measure a redshifted spectrum. You look at (or determine via theory) what the original wavelength/frequency of the photon was when it left the source and compare that with what you measured at the photomultiplier."
Bojan replied inter alia
Quote:
Originally Posted by bojan
...If I received one single photon with my test equipment, I must admit I wouldn't know what to do with it - apart from recording it's energy (which then directly translates into wavelength of course... and photomultiplier tube will not do this job, BTW). And that's about it. I wouldn't have a clue about process that generated that particular photon, so I can't possibly determine it's redshift.
I believe THIS was the core of the question in question.
|
Bojan's reply that the redshift cannot be measured contradicts Renormalised. I agree with Bojan the redshift of a single photon can't be determined. Others in the thread were unwilling or unable to answer the question. When I pressed for an answer gave wrong, irrelevant or evasive replies and cast aspersions on my motives. Gentlemen, whether you answer questions or not is your prerogative: but what you have indulged in just wastes space.