Quote:
Originally Posted by renormalised
Being "smart" about it will not make your reply any less puerile.
Let's make it clear right from the start....the relative ages of any photon have nothing to do with the question that you specifically asked. Your question has nothing to do with the original question of Craig's.
Your responses show a clear lack of understanding either our answers or any of the physics involved. I doubt very much if you'd understand the original question that was posed.
Don't try and sound all reasonable. It doesn't work. Yours is a case of the pot calling the kettle black.
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You are looking at your reflection in a mirror
All I asked was
how can the "redshift" of a single photon be measured?
Only Bojan addressed that question squarely