If you make it so that all dimensions expand equally, it turns out that nothing physical changes: all you've done is made a change in your equations that rescales the coordinate system. Instead, an expansion is only physical if some dimensions expand relative to other dimensions. In our case, it is usually written as the three dimensions of space expanding relative to the time dimension. Of course, if you wanted to, you could massage the equations so that the time dimension would instead change while the spatial dimensions remain the same, but that would be a much less intuitive way of understanding the physical behavior.Exmech said:Hello! I'm brand new to the forum and have a question that has been nagging at me for some time. I've read a great number of articles regarding the red shift, as well as time being a dimension. I was wondering if anyone has addressed the possibility that time might also be subject to the red shift. That is, the dimension is expanding at the same rate as the 3 spatial dimensions. Any literature anyone has on this would be most appreciated.
Chalnoth said:If you make it so that all dimensions expand equally, it turns out that nothing physical changes: all you've done is made a change in your equations that rescales the coordinate system.
Red shift is a phenomenon in which light from distant objects appears to have a longer wavelength, indicating that the object is moving away from us. This is due to the expansion of the universe, which causes a stretching of light waves as they travel through space. Red shift is directly related to time because it provides evidence for the expansion of the universe, which is a key factor in the concept of time expanding as well.
The concept of time expanding is a theory that is currently being studied and debated by scientists. While there is evidence to suggest that the universe is expanding, there is no conclusive evidence that time is expanding along with it. However, this theory is still being explored and studied in the scientific community.
If time is indeed expanding, it could have significant implications for our understanding of the universe. It could change our understanding of how the universe began, how it is evolving, and how it will end. It could also potentially affect our understanding of concepts such as gravity and the nature of space-time.
While there is no direct evidence for time expanding, there are some theories and observations that support the idea. For example, the red shift of light from distant galaxies suggests that the universe is expanding, which could also imply that time is expanding. Additionally, some theories suggest that time may have expanded during the early stages of the universe's formation.
Scientists are studying the concept of time expanding through various methods, including theoretical models and observations of the universe. They are also conducting experiments and observations using advanced technologies, such as telescopes and particle accelerators, to gather more data and evidence. The concept of time expanding is a complex and ongoing area of study in the scientific community.