Recent content by Martin68

Not necessarily I have to understand it ... 😁 ... but, why is the derivation of r squared and drawn root the same as the amount of r? And the next step I do not understand at all 😅 (But, no problem)

This word I never heard before (but looked now in wikipedia) 😁

... I'm a programmer and for me it's early in the morning :biggrin:

I apologize for all that mess, that was not my intention :nb) In German we have: Geschwindigkeit - can be both, vector and amount Geschwindigkeitsvector - the vector Geschwindigkeitsbetrag - the amount What would be the correct translation for that three things?

... oh oh, my english and my ability to write what I want to express :-))

No, for the ball this is an inertial system (I don't know if this is physically and in english correct, you call it 'frame'?)

Many thanks ... but: I am only an interested 'normalo'. For that, I would have to repeat all stuff of my maths-lecture (my course of studies over 20 years ago was software-engeneering) and additionally eat some very thick maths-books :#)))

[If I don't react to all statements: My English is not so good to transform all described models from English to german :#)] ... but I try to understand everything

Yes, I have never seen this in that way. But I'm fine with that :cool: . Many thanks!

Wow, so many people helping me understand ... fantastic :-)) Ok, in the example with the ball in the train it is clear: The ball has got the side-movement from the train. Until now I thought, a photon does not have that. I thought it would be like a stone that is thrown into the water. Image...

Many thanks for the further explanations :cool: If we take as given that the sent out photons are taking over the directional vector of the moving clock, then everything is plausible. But the question still exists: WHY does the light is taking the directional vector? Is there also a physical...

Hi A.T. and Ibix, many thanks for the fast answers ... and for the moment it is clear to me. I will have to think about that, maybe there are more questions :#) Best regards Martin

Hi all, a maybe silly question: In the SRT-experiment with the lightwatch (which is taken to show the time dilation for a moving clock), why does the light follow the clock? Light is indepedent of the emitting source. So I would expect that the clock is moving away and the light is moving...