There's no question that for distant objects, one has to take into account the curvature of space-time to get the right answer for the redshift. For nearer objects, this just reduces to a relativistic doppler effect. When you start getting out to around a Hubble radius, however, this starts to become rather wrong and you have to take into account the space-time curvature.AWA said:In several threads where I've seen the redshift issue discussed there's been some confusion about this point, Must we treat cosmological redshift as a purely kinematic (relativistic)doppler effect or as the time dymamics of the metric space? Or both views can be made to converge?
Cosmological redshift is the phenomenon where light from distant objects, such as galaxies and quasars, appears to be shifted towards the red end of the spectrum. This is similar to the Doppler effect, where the wavelength of light is stretched as the source of light moves away from the observer.
Metric evolution refers to the expansion of the universe, which causes space itself to stretch. This stretching of space results in the redshift of light from distant objects, as the wavelength of light is also stretched along with space.
Yes, cosmological redshift is a reliable measure of distance for objects that are far away from us. This is because the amount of redshift observed is directly proportional to the distance of the object, according to Hubble’s law.
No, cosmological redshift cannot be observed in a laboratory setting. This is because it is a result of the expansion of the universe, which cannot be replicated in a controlled environment.
The observation of cosmological redshift provided evidence for the expanding universe, which is a key component of the Big Bang theory. Additionally, the amount of redshift observed in distant objects is consistent with the predictions of the Big Bang model.