Pentcho Valev
2015-06-21 17:27:34 UTC
http://galileospendulum.org/2015/01/02/dont-bet-on-the-failure-of-relativity/
Matthew Francis: "Special relativity, developed by Einstein from earlier work by the likes of Henrik Lorentz and Henri Poincaré, is based on two principles: 1) the basic laws of physics hold good in every reference frame moving at a constant velocity and 2) the speed of light in a vacuum will have the same value, no matter how fast the measurer is traveling. Since speed is ratio of a distance to an interval of time, to keep the speed of light the same relative to every frame of reference, different observers will measure different lengths or time intervals, depending on how fast they are moving with respect to each other. That also means that two events that appear to happen simultaneously to one observer may not appear to be simultaneous to another observer moving at a different velocity."
Why should one "keep the speed of light the same relative to every frame of reference"? Einsteinians have a simple answer: Because the cosmic (not Einsteinian) conspiracy of the highest order should be obeyed:
http://astro.cornell.edu/academics/courses/astro109/readings/speedlimit.htm
Neil deGrasse Tyson: "If everyone, everywhere and at all times, is to measure the same speed for the beam from your imaginary spacecraft, a number of things have to happen. First of all, as the speed of your spacecraft increases, the length of everything - you, your measuring devices, your spacecraft - shortens in the direction of motion, as seen by everyone else. Furthermore, your own time slows down exactly enough so that when you haul out your newly shortened yardstick, you are guaranteed to be duped into measuring the same old constant value for the speed of light. What we have here is a cosmic conspiracy of the highest order."
http://www.redorbit.com/news/space/1113378923/cosmic-yarns-science-fiction-and-the-cosmic-speed-limit-042715/
Robert Scherrer: "In fact, the laws for adding and subtracting speeds have to conspire to keep the speed of the light the same no matter how fast or in what direction an observer is moving. The only way to make this happen is for space and time to expand or contact as objects move."
https://plus.maths.org/content/einstein-relativity
David Tong: "Special relativity is where the famous equation E=mc^2 comes from. The central idea of the theory is that there is a speed limit in our Universe. The laws of physics conspire so that nothing can ever travel faster than the speed of light."
Brian Greene: "Einstein proposed a truly stunning idea - that space and time could work together, constantly adjusting by exactly the right amount so that no matter how fast you might be moving, when you measure the speed of light it always comes out to be 671000000 miles per hour."
http://www.pbs.org/wgbh/nova/physics/special-relativity-nutshell.html
Brian Greene: "If space and time did not behave this way, the speed of light would not be constant and would depend on the observer's state of motion. But it is constant; space and time do behave this way. Space and time adjust themselves in an exactly compensating manner so that observations of light's speed yield the same result, regardless of the observer's velocity."
Pentcho Valev
Matthew Francis: "Special relativity, developed by Einstein from earlier work by the likes of Henrik Lorentz and Henri Poincaré, is based on two principles: 1) the basic laws of physics hold good in every reference frame moving at a constant velocity and 2) the speed of light in a vacuum will have the same value, no matter how fast the measurer is traveling. Since speed is ratio of a distance to an interval of time, to keep the speed of light the same relative to every frame of reference, different observers will measure different lengths or time intervals, depending on how fast they are moving with respect to each other. That also means that two events that appear to happen simultaneously to one observer may not appear to be simultaneous to another observer moving at a different velocity."
Why should one "keep the speed of light the same relative to every frame of reference"? Einsteinians have a simple answer: Because the cosmic (not Einsteinian) conspiracy of the highest order should be obeyed:
http://astro.cornell.edu/academics/courses/astro109/readings/speedlimit.htm
Neil deGrasse Tyson: "If everyone, everywhere and at all times, is to measure the same speed for the beam from your imaginary spacecraft, a number of things have to happen. First of all, as the speed of your spacecraft increases, the length of everything - you, your measuring devices, your spacecraft - shortens in the direction of motion, as seen by everyone else. Furthermore, your own time slows down exactly enough so that when you haul out your newly shortened yardstick, you are guaranteed to be duped into measuring the same old constant value for the speed of light. What we have here is a cosmic conspiracy of the highest order."
http://www.redorbit.com/news/space/1113378923/cosmic-yarns-science-fiction-and-the-cosmic-speed-limit-042715/
Robert Scherrer: "In fact, the laws for adding and subtracting speeds have to conspire to keep the speed of the light the same no matter how fast or in what direction an observer is moving. The only way to make this happen is for space and time to expand or contact as objects move."
https://plus.maths.org/content/einstein-relativity
David Tong: "Special relativity is where the famous equation E=mc^2 comes from. The central idea of the theory is that there is a speed limit in our Universe. The laws of physics conspire so that nothing can ever travel faster than the speed of light."
Brian Greene: "Einstein proposed a truly stunning idea - that space and time could work together, constantly adjusting by exactly the right amount so that no matter how fast you might be moving, when you measure the speed of light it always comes out to be 671000000 miles per hour."
http://www.pbs.org/wgbh/nova/physics/special-relativity-nutshell.html
Brian Greene: "If space and time did not behave this way, the speed of light would not be constant and would depend on the observer's state of motion. But it is constant; space and time do behave this way. Space and time adjust themselves in an exactly compensating manner so that observations of light's speed yield the same result, regardless of the observer's velocity."
Pentcho Valev