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sunrah
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Where does the requirement come from that special relativity applies only locally? It is not immediately obvious from the two postulates. I'm asking because this is important for the validity of the Hubble Law.
sunrah said:Where does the requirement come from that special relativity applies only locally? It is not immediately obvious from the two postulates. I'm asking because this is important for the validity of the Hubble Law.
What I have read from Nugatory in post #2 is that SR is not a large scale theory. So how could it be invalidated on scales it is not working in ?sunrah said:invalidate SR on large scales.?
sunrah said:I thought that spacetime was flat and with no discernible non-trivial topology.
Special relativity is a fundamental theory in physics that describes the relationship between space and time, and how they are affected by the relative motion of objects.
Special relativity is considered a local phenomenon because it only applies to objects in relative motion within a small region of space. It does not take into account the effects of gravity or the curvature of space-time, which are described by general relativity.
Special relativity explains time dilation by showing that time is relative and can appear to pass at different rates for observers in different frames of reference. This is due to the fact that the speed of light is constant and the laws of physics are the same for all inertial observers.
The speed of light plays a crucial role in special relativity as it is the maximum speed at which all objects and information can travel. It is a fundamental constant that is the same for all observers, regardless of their relative motion.
Special relativity has greatly impacted our understanding of the universe by providing a framework for explaining the behavior of objects in motion and the relationship between space and time. It has also led to the development of other important theories, such as general relativity and quantum mechanics, which have helped us gain a deeper understanding of the fundamental laws of the universe.