“So what”. My point is you cannot prove Einstein’s relativity theories are correct by citing small variations in the ticking of clocks.
You know of at least two explanations of gravity: Einstein’s and mine. I assume you have read my Chapter XX, “Black Holes and Gravity”. My explanation is enormously simpler than Albert’s. John R. From: [email protected] [mailto:[email protected]] On Behalf Of LizR Sent: Monday, June 23, 2014 3:03 PM To: [email protected] Subject: Re: TRONNIES - SPACE On 24 June 2014 08:55, John Ross <[email protected]> wrote: All of the GPS satellites know exactly where they are relative to some position here on earth. They are all in communication with each other and they know how fast a radio beam travels. It would be a simple matter to regularly adjust their clock speeds so all of the clocks operate at the same speed as a master clock here on earth. My guess is that is exactly what they do. I doubt if it is possible to construct a clock that keeps time infinitely correctly. So what? I think you have said before that if two theories explain the same thing, it is more likely than not that the simplest theory is correct. I see no reason why time should pass more slowly if we go fast or quicker if we are in a reduced gravity. So far I only know of one (relatively simple :-) theory that explains these observations. Here is a question for you: We on a distance galaxy are watching a separate galaxy one light-year from a Monster Black Hole and speeding toward it at a speed of c. A baby has just been born in the speeding galaxy. How old will the baby be when the galaxy is consumed by the Monster Black Hole? Our galaxy is stationary with respect to the Monster Black Hole. My answer is the simple answer. What is your answer? JR From: [email protected] [mailto:[email protected]] On Behalf Of LizR Sent: Tuesday, June 17, 2014 3:21 PM To: [email protected] Subject: Re: TRONNIES - SPACE On 18 June 2014 08:43, <[email protected]> wrote: I understand clocks in satellites do not run at the same speed as clocks here on earth. However, I just can't understand why we would use Einstein's equations to adjust the clocks on satellites when it would be so easy to adjust them in accordance to the exact time here on earth. That isn't the point. For all I know they may adjust them using clocks on Earth. The point is that the satellites provide yet another way to test special and general relativity, and since scientists are always trying to check their theories are correct, they consider it worthwhile to work out how fast or slow these theories say the satellites' clocks will run and compare this to the measured values. The results are in accordance with both theories - working out the time dilation due to the satellites' relative motion and their position in the Earth's gravity field gives the observed result. Note that SR and GR give this result without needing any free parameters to be tweaked. SR involves simple geometry applied to 4 dimensional space-time; as far as I know the only "free" parameter is the speed of light. GR involves the gravitational constant (I think) but I'm told there are no simple ways in which the equations can be modified to give similar results. Hence the clock rate is "forced" to have a particular value in both theories - the result falls out naturally from the theories without any need to introduce any corrections that could equally well have given other results. Here <http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html> is a more detailed description of this effect. If you have a theory that can give the same result (with a similar lack of "wriggle room" for adjusting free parameters) then you should get some serious interest from scientists. -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
