Doppler effect of light spectrum

[binbots]

When we first realized that the further away a galaxy is the further towards the red side of the spectrum it was, we beleived this to be do to the expansion of the universe? Wouldn't it have been simplier to say that the further away a galaxy was the further the wave function stretched over space time? Just like in a pond? I know this is crazy as it would spell the end of current consmology. I just want to know why the second one didnt make more sense?

 

[TheTechNoir]

As far as I understand the wave function doesn't stretch, it stays consistent in it's wavelength. It is the expansion of the universe that is causing it to outstretch as the spatial distance itself in between wavelength peaks/troughs is actually growing.

EDIT: Oh you are asking wouldn't it be simpler to conclude that a property of waves is that over long distances they slowly stretch? It probably contradicted already known properties of waves but I'm not certain.

 

[binbots]

yes, I figured it had to do with the fact that it has been proving that light does not stretch. I was wondering what this proof is?

 

[binbots]

nothing?

 

[pmacias]

The Doppler effect of light spectrum is a phenomenon that occurs when there is a relative motion between a light source and an observer. This causes a shift in the observed wavelength of the light, resulting in a change in color. This effect has been observed in various astronomical objects, including galaxies.

Initially, it was believed that the redshift observed in distant galaxies was due to the expansion of the universe. This theory, known as the Big Bang theory, suggests that the universe is continuously expanding and that the further away a galaxy is, the faster it appears to be moving away from us. This is similar to the way a rubber band stretches when pulled from both ends.

However, as our understanding of the universe and its properties has evolved, it has become clear that the Doppler effect of light spectrum is not the only factor at play. The stretching of the wave function over space-time, as mentioned in the question, is also a contributing factor. This is known as the cosmological redshift and is a result of the expansion of space itself.

While the concept of the wave function stretching over space-time may seem simpler, it does not fully explain the observed redshift in distant galaxies. In fact, it would not account for the observed differences in the redshift of galaxies at different distances. This is where the Big Bang theory and the concept of cosmic expansion provide a more comprehensive explanation.

In short, while the idea of the wave function stretching over space-time may seem appealing, it does not fully explain the observations and would not be able to replace the current understanding of cosmology. The Doppler effect of light spectrum and the expansion of the universe are both important factors in understanding the redshift of distant galaxies and the overall structure of our universe.