How then is it possible to know that it is possible for a body in such a system to escape if we can never prove when or if it does so? Are there special cases in which we can prove that one body escapes and thus affirm this possibility- but then in other cases we simply lack the methods to prove...
I am asking this question because I found it in a lecture by Stephen Wolfram which you can see at this link at about 54:10:
Apparently the question cannot be answered with current methods of physics- Wolfram describes it as "undecidable". But what is the question? When he says "escape" does...
From Relativity:
"Considerations on the Universe as a Whole
XXX. Cosmological Difficulties of Newton’s Theory
APART from the difficulty discussed in Section XXI, there is a second fundamental difficulty attending classical celestial mechanics, which, to the best of my knowledge, was first...
After reading some of Einstein's writings on relativity I am confused as to why he finds it necessary that the universe is finite.
In his "Relativity", Einstein explains that the ultimate Newtonian picture of the universe (matter in Euclidean space) would be one in which all mass were...
I have been trying to understand General Relativity theory better. From what I have gathered, Einstein's Field Equations are the tools by which the geometry of space-time can be mathematically defined. In my adventures on the internet trying to better understand this concept, I inevitably came...
I am still stuck on this: Let's say that there is a clock moving at a particular velocity past you, but you only look at it (detect it) as it passes in front of you from left to right. In this case there would be no, or only negligible Doppler effect, and the clock would be seen as ticking...
Thanks for the response! Now that you have clarified a few things let me ask another question.
Is there a particular velocity at which the increased frequency registered with the parallel observer of that velocity due to the Doppler effect would precisely equal the decreased registered...
Hello all,
I have not studied general relativity only special relativity, I apologize therefore if my questions seem low level. Thank you for your help.
Three questions:
The way in which I learned that the twin paradox is resolved is through the illustration of the way in which the observer...
Hello,
I had some questions on escape velocity. The only methods that I have seen on escape velocity involve the assumption that the mass which is "being escaped from" remains at rest (at a fixed point in space). For example the method of determination of escape velocity using Ki+Ui=Kf+Uf seems...