Recent content by Frank Wappler

Hi weirdoguy, thanks for your message; helpful was: https://www.physicsforums.com/conversations/insight-posting.238284/#convMessage-359260 (Frabjous' link to https://www.physicsforums.com/threads/when-discussing-the-twin-paradox-read-this-first.1048697/ -- for what it was worth -- +...

Referring to a specific ideal clock, C, the corresponding constant KC is by Gourgoulhon's definition to be measured explicitly as $$ K_C := \frac{\tau_C[ \, \text{tick}_{j}, \text{tick}_{(j + N)} \, ]}{N},$$ provided at least one suitable index value ##j## and at least one suitable increment...

I think that's (already by itself) a great answer to my question part (3) -- provided that "one tick period" (or "several consecutive tick periods") is to be understood in the well-known sense of a duration of the (ticking, ideal) clock under consideration. For that, so far: Thank you! Any...

Regardless of whether the distances under consideration happen to be huge, or tiny, or in the range of human everyday experience: The (conventional) stipulation, how and under which conditions simultaneity (or dis-simultaneity) should be determined at least in principle, is (for instance)...

In lieu of any other PhysicsForums sandbox (known to me): literal copy+paste from https://www.physicsforums.com/help/latexhelp/ $$x = \frac {-b \pm \sqrt{b^2 -4ac}} {2a},$$

In lieu of any other PhysicsForums sandbox (known to me): literal copy+paste from https://www.physicsforums.com/help/latexhelp/ $$x = \frac {-b \pm \sqrt{b^2 -4ac}} {2a},$$

In sect. 2.3.2 "Ideal Clock", p. 33, of É. Gourgoulhon's text book on "Special Relativity in General Frames" $$ \tau_C [ \, \text{tick}_{j}, \text{tick}_{(j + N)} \, ] = K_C \, N. $$ (equation (2.11); notation adapted.) The only other reference to this "constant K" is on the following page...

Well -- it says there: https://www.physicsforums.com/insights/when-discussing-the-twin-paradox-read-this-first/ -- but, unfortunately, there doesn't seem to be a link provided (for me, yet, having registered just minutes ago). So, meanwhile, here's the reply I had prepared for submission to...

Having sailed to a Ph.D. (exp. particle physics) and beyond more two decades ago, I've become increasingly critical about presentations and didactics of the theory of relativity, especially as far as it relates to experimental physics ... This forum seems to be more inviting to exchanges of...