Recent content by Lutz-F

@jbriggs444: Now I see the difference - and my lack of knowledge. I just read about the twin paradox and I realized that it is often oversimplified, described without the details. @Ibix: I acceps the anwers and I'm satisfied. Thank you all.

Thank you for your patience and your answers. I think I need to realize that there is no answer for my initial question: Maybe the question really does not make sense. Your answer: seems to be an answer for many questions. I thought that there are not only the laws and formulas but some...

So the notion of "inertial mass" is out of date? What is the alternative? Faster relative speed effects spacetime in the same way as a more intense gravitational field. - Does faster relative speed cause a kind of bow wave in spacetime that more and more impedes acceleration?

Is the inertial mass bigger in a more intense gravitational field (for example on earth) than in a less intense gravitational field (for example on the moon)? Is the inertial mass bigger in a system with faster relative speed? Is that what they have in common that affects spacetime in the same way?

The two different processes have the same effect due to the structure of our universe. That is very general... Does that mean that electromagnetic waves and gravitational waves have at least one common property? Or, in principle, are both waves traveling properties of spacetime? Do they have...

The faster the relative speed or the more intense the gravitational field, the slower time passes. Does it make sense to ask what both have in common that affects time? Or does the question possibly only make sense in the context of certain theories, for example the LQG, where space and time...

"The effort to understand the universe is one of the very few things that lifts human life a little above the level of farce, and gives it some of the grace of tragedy." (Steven Weinberg)

Thanks for your advice. I should have continued studying mathematics instead of economics... :biggrin: So it seems that Carlo Rovelli has been a little bit vague and optimistic in describing the part of the theory that relates to the curvature of spacetime. He wrote in the above mentioned book...

It's a pity that nobody knows about the LQG. Are there any arguments against this theory? What I like about this theory and what I have read in Carlo Rovellis book: The theory has no arbitrary assumptions and is only based on general relativity, quantum mechanics and compatibility with the...

From the german Version of Carlo Rovellis book "La realtà non è come ci appare. La struttura elementare delle cose" I have learned about the theory of Loop Quantum Gravity that space and time arise through the interactions of gravitational quanta, the space quanta have discrete volume spectra...