4. to understand that something can be curved without there being an extra dimension---part of the mental exercise is to picture the balloon surface as all there is, there is no inside the balloon and there is no outside---only the balloon surface exists.
pondzo said:thanks for the link jimmy, ill try and get through the thread, but it is quite lengthy!
pondzo said:Thank you for the link phinds, much quicker than the other thread, although the other thread has some interesting content.
i have had this toy for a while exactly the same as this:
is the increase of the distance between the (inside layer) orange dots at all analogical to the expansion of space?
The evidence for the expansion of the universe comes from several sources, including the observation of redshift in the light from distant galaxies, the cosmic microwave background radiation, and the distribution of galaxies in the universe. These observations suggest that the universe is expanding at an accelerating rate, meaning that the space between galaxies is increasing.
The expansion of the universe is not necessarily related to a 4th spatial dimension. In fact, current theories and observations suggest that the universe has three spatial dimensions (length, width, and height) and one dimension of time. The concept of a 4th spatial dimension is still a topic of debate and further research.
The concept of a 4th spatial dimension is a theoretical idea that suggests there may be an additional spatial dimension beyond the three dimensions that we are familiar with. This concept has been explored in various scientific theories, such as string theory and M-theory, but has not yet been proven or observed.
If a 4th spatial dimension does exist, it could potentially change our understanding of the universe in many ways. It could provide an explanation for certain phenomena, such as dark matter and dark energy, which are currently not fully understood. It could also lead to new insights and predictions about the behavior of matter and energy in the universe.
Currently, there is no experimental evidence for a 4th spatial dimension. However, some scientists believe that future experiments, such as those at the Large Hadron Collider, may provide evidence or insights into the possible existence of a 4th spatial dimension. Until then, the concept remains a theoretical idea in the field of physics.