A puzzle for the SRians
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From: kenseto on 26 Jul 2010 17:12 Einstein's train gedanken is modified as follows: When M and M' are coincide with each other......two lightning strikes hits the ends of the train and the light fronts arrive at M' non- simultaneously. Question for the SRians: does this mean that according to the SR concept of relativity of simultaneity M will see the light fronts arrive at him simultaneously? Since there are an infinite number of pairs of strikes that can cause the light fronts to arrive at M' non-simultaneously, does that means that there are infinite pairs of strikes that M will see their light fronts to arrive at him simultaneously????? Ken Seto
From: Sam Wormley on 26 Jul 2010 17:18 On 7/26/10 4:12 PM, kenseto wrote: > Einstein's train gedanken is modified as follows: > When M and M' are coincide with each other......two lightning strikes > hits the ends of the train and the light fronts arrive at M' non- > simultaneously. Ken, order of event is observer dependent and nicely presented in the 30-minute episode of the Mechanical Universe you can watch on your computer! The Mechanical Universe series. http://www.learner.org/resources/series42.html 42. The Lorentz Transformation If the speed of light is to be the same for all observers, then the length of a meter stick, or the rate of a ticking clock, depends on who measures it. Lesson 42: The Lorentz Transformation If the speed of light is to be the same for all inertial observers (as indicated by the Michelson-Morley experiment) the equations for time and space are not difficult to find. But what do they mean? They mean that the length of a meter stick, or the rate of ticking of a clock depends on who measure it. Text Assignment: Chapter 46 Instructional Objectives Be able to use the Lorentz Transformation to work problems relating time or space intervals in different reference frames. Be able to give some of the hypothetical explanations put forward to account for the Michelson-Morley experiment. Be able to discuss the concept of length contraction. Be able to understand and use spacetime diagrams. Be able to define and discuss the concept of simultaneity. Be able to define and discuss clock synchronization.
From: kenseto on 26 Jul 2010 17:21 On Jul 26, 5:18 pm, Sam Wormley <sworml...(a)gmail.com> wrote: > On 7/26/10 4:12 PM, kenseto wrote: > > > Einstein's train gedanken is modified as follows: > > When M and M' are coincide with each other......two lightning strikes > > hits the ends of the train and the light fronts arrive at M' non- > > simultaneously. > > Ken, order of event is observer dependent and nicely presented > in the 30-minute episode of the Mechanical Universe you can watch > on your computer! Hey wormy....why don't you answer my questions??? > > The Mechanical Universe series. > http://www.learner.org/resources/series42.html > > 42. The Lorentz Transformation > If the speed of light is to be the same for all observers, then > the length of a meter stick, or the rate of a ticking clock, > depends on who measures it. > > Lesson 42: The Lorentz Transformation > > If the speed of light is to be the same for all inertial observers (as > indicated by the Michelson-Morley experiment) the equations for time and > space are not difficult to find. But what do they mean? They mean that > the length of a meter stick, or the rate of ticking of a clock depends > on who measure it. > > Text Assignment: Chapter 46 > > Instructional Objectives > > Be able to use the Lorentz Transformation to work problems relating time > or space intervals in different reference frames. > Be able to give some of the hypothetical explanations put forward to > account for the Michelson-Morley experiment. > Be able to discuss the concept of length contraction. > Be able to understand and use spacetime diagrams. > Be able to define and discuss the concept of simultaneity. > Be able to define and discuss clock synchronization.
From: JT on 26 Jul 2010 17:22 On 26 Juli, 23:18, Sam Wormley <sworml...(a)gmail.com> wrote: > On 7/26/10 4:12 PM, kenseto wrote: > > > Einstein's train gedanken is modified as follows: > > When M and M' are coincide with each other......two lightning strikes > > hits the ends of the train and the light fronts arrive at M' non- > > simultaneously. > > Ken, order of event is observer dependent and nicely presented > in the 30-minute episode of the Mechanical Universe you can watch > on your computer! > > The Mechanical Universe series. > http://www.learner.org/resources/series42.html > > 42. The Lorentz Transformation > If the speed of light is to be the same for all observers, then > the length of a meter stick, or the rate of a ticking clock, > depends on who measures it. > > Lesson 42: The Lorentz Transformation > > If the speed of light is to be the same for all inertial observers (as > indicated by the Michelson-Morley experiment) the equations for time and > space are not difficult to find. But what do they mean? They mean that > the length of a meter stick, or the rate of ticking of a clock depends > on who measure it. > > Text Assignment: Chapter 46 > > Instructional Objectives > > Be able to use the Lorentz Transformation to work problems relating time > or space intervals in different reference frames. > Be able to give some of the hypothetical explanations put forward to > account for the Michelson-Morley experiment. > Be able to discuss the concept of length contraction. > Be able to understand and use spacetime diagrams. > Be able to define and discuss the concept of simultaneity. > Be able to define and discuss clock synchronization. It is childish to resort to recitations from book Sam, try to argue the case would be more proper. JT
From: Sam Wormley on 26 Jul 2010 17:52
On 7/26/10 4:21 PM, kenseto wrote: > On Jul 26, 5:18 pm, Sam Wormley<sworml...(a)gmail.com> wrote: >> On 7/26/10 4:12 PM, kenseto wrote: >> >>> Einstein's train gedanken is modified as follows: >>> When M and M' are coincide with each other......two lightning strikes >>> hits the ends of the train and the light fronts arrive at M' non- >>> simultaneously. >> >> Ken, order of event is observer dependent and nicely presented >> in the 30-minute episode of the Mechanical Universe you can watch >> on your computer! > > Hey wormy....why don't you answer my questions??? The Mechanical Universe episode answers the question in a clear and concise fashion! And with a bit of humor! > >> >> The Mechanical Universe series. >> http://www.learner.org/resources/series42.html >> >> 42. The Lorentz Transformation >> If the speed of light is to be the same for all observers, then >> the length of a meter stick, or the rate of a ticking clock, >> depends on who measures it. >> >> Lesson 42: The Lorentz Transformation >> >> If the speed of light is to be the same for all inertial observers (as >> indicated by the Michelson-Morley experiment) the equations for time and >> space are not difficult to find. But what do they mean? They mean that >> the length of a meter stick, or the rate of ticking of a clock depends >> on who measure it. >> >> Text Assignment: Chapter 46 >> >> Instructional Objectives >> >> Be able to use the Lorentz Transformation to work problems relating time >> or space intervals in different reference frames. >> Be able to give some of the hypothetical explanations put forward to >> account for the Michelson-Morley experiment. >> Be able to discuss the concept of length contraction. >> Be able to understand and use spacetime diagrams. >> Be able to define and discuss the concept of simultaneity. >> Be able to define and discuss clock synchronization. > |