On Saturday, February 16, 2019 at 6:06:58 PM UTC-6, [email protected] wrote: > > 1) Using the EP and the example of an accelerating elevator, it follows > that light takes a curved path in space (not space-time). Wasn't this > known by virtue of Newtonian gravity? >
Newton computes half the correct value by general relativity. > > 2) Assuming a geodesic is the shortest distance between two *spatial* > points on a curved surface, does it follow from the EP that free falling > bodies move on geodesics, and if if so how? > > It is an extremal distance, and because of the Lorentzian metric is is the maximal distance. This extremal principle derives the geodesic equation. This is a standard exercise in introductory courses on general relativity. > 3) Concerning the above questions, how does "space-time" enter the picture > since it seems the questions can be asked without referencing space-time. > It is because the global or flat theory is special relativity that pertains to local inertial frames. LC > > TIA, AG > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
