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No, it is detected also by instruments having nothing to do with anyone's eyesight.
How would an instrument know it was the ''colour'' red?
Isn't Hubble a telescope that uses vision?
Measure the frequency
There isn't a human eye looking down the end.I think you need to be clearer what you mean by "change in vision"Also, you might want to consider what might cause such a change, unless you are suggesting it is all in the imagination!
Quote from: Thebox on 16/05/2016 17:08:00How do you measure the frequency of something that is very far away? You wait until it arrives, then measure it, using a spectrometer.
How do you measure the frequency of something that is very far away?
You wait until it arrives, then measure it, using a spectrometer.
Hmm you wait for it to arrive, but is light not continuously arriving and also continuously being emitted from the observation ''point'' , how do you know the light that is arriving is the light from a distant ''object' , do you directly aim your spectrometer at the ''object''?
Relative to the observer how do you know the light is not red shifting this ''end''?
Relativity states that if two observers are in motion, neither observer can tell who is moving, it all sounds a bit hmmmm to me.
because we also observe blue shifts, and red shifts vary from object to object, so it seems more likely that the shift is connected with the source rather than the receiver.