I’ve been following the thread, Relativity and Simultaneity, at SciForums
http://www.sciforums.com/showthread.php?p=2762181#post2762181
The thread was originated by Motor Daddy. It was of particular interest to me because he introduces a new postulate in place of Einstein’s second postulate.
From Wiki on the postulates of Special Relativity:
1. First postulate (principle of relativity)
The laws by which the states of physical systems undergo change are not affected, whether these changes of state be referred to the one or the other of two systems of coordinates in uniform translatory motion.
2. Second postulate (invariance of c)
As measured in any inertial frame of reference, light is always propagated in empty space with a definite velocity c that is independent of the state of motion of the emitting body.
MD introduced the concept of a moving light box to clarify his objection to the second postulate.
He assumes he is in an inertial frame of reference in which a flash of light is propagated at a point and time in absolute space without knowledge of the motion of that frame relative to the point in space and time where the propagation took place.
He assumes that the point of propagation of light occurs at a fixed point in space at a fixed time regardless of the frame of reference.
Is there actually a point in space where that light is propagated that would be agreed upon by observers in other frames? MD’s answer is yes, if the frames coincided at the instant the light was propagated, then someone moving relative to the rest frame that hosted the point of propagation would see the light propagated at the same point in space and time.
According to the SR postulate that light propagates at c in all frames, we would all agree that the speed of the light observed from all frames as it is emitted propagates at c in all frames. I used “in all frames” three times in the sentence on purpose. The first “in all frames” is part of the postulate. The second “in all frames” is that the light was physically observed to be emitted as an event in all frames that coincided at the point and time of propagation in space. The third “in all frames” was that the light propagated at c in each inertial frame regardless of the relative motion of that frame to the point of emission.
The problem quickly comes to light. If the observers are correct, i.e. that the light was propagated at the same point in space and time in all frames, and if the SR postulate is correct, i.e. that light travels at c in all inertial frames that are moving relative to each other, then in order for the postulate to be true the speed of light would have to be independent of the point of emission unless the point of emission would be considered moving with the motion of the frame of the observer.
In other words there can be no absolute point in space and time according to the postulates of SR. Any point in space that coincides with multiple moving frames at the instant of an event is assumed to be moving with the frames and not fixed at a point in absolute space and time. All frames moving relative to the point in space and time of the event will effectively take their space and time with them as they move away from the coincident point in space.
MD’s Box lays out an alternative postulate. Light propagates at c from the absolute point in space where it is propagated.
His position is that if the light ray (see below *) that is emitted from that absolute point in space is observed from a frame of reference in motion relative to the fixed point of emission in space and time, the speed of the light would be measured at c + or – the difference in the rate of motion between the observing frame and the absolute point in space and time where the emission occurred.
(* or light sphere which is an in-phase composite of rays across a spherical light wave front expanding in space at c in all directions)
This means that MD’s Box is not in line with the terminology of Special Relativity. There is no absolute space or time in SR and there is in MD’s Box scenario.
However, MD says or at least implies that the fixed point in space and time is not an inertial frame; it is a point in absolute space and in absolute time that coincided with an inertial frame at the point in space and time of the light flash.
I come forward to agree that a light ray or expanding sphere of light has a physical presence in space and expands at c from the fixed point of emission in absolute space and time. We have agreed that the light sphere always expands at c relative to the fixed point in space and time, and therefore that point in space and time does not move in empty space or along the time continuum regardless of the motion of the frames that coincided with that point in space at the time of the emission.
My interest in MD’s Relativity of Simultaneity stems from my QWC speculations. 1) In QWC there is an arena process where arenas that emerge from Big Bangs have a fixed point in space from which their arena expansion occurs. Multiple arenas represent multiple fixed points in absolute space and absolute time. 2) Also, in QWC there is a process of quantum action that establishes the physical presence of particles of matter. Quantum action is characterized by high density spots that are fixed in absolute space and time, and the standing wave concept of particles advocated by QWC is completely compatible with the concept of absolute space and time. 3) In QWC gravity is caused by an imbalance between inflowing and out flowing wave energy associated with quantum action that establishes the presence of mass. The notion of absolute points of emission of out flowing gravity waves is completely compatible with the concept of absolute space and time.
http://www.sciforums.com/showthread.php?p=2762181#post2762181
The thread was originated by Motor Daddy. It was of particular interest to me because he introduces a new postulate in place of Einstein’s second postulate.
From Wiki on the postulates of Special Relativity:
1. First postulate (principle of relativity)
The laws by which the states of physical systems undergo change are not affected, whether these changes of state be referred to the one or the other of two systems of coordinates in uniform translatory motion.
2. Second postulate (invariance of c)
As measured in any inertial frame of reference, light is always propagated in empty space with a definite velocity c that is independent of the state of motion of the emitting body.
MD introduced the concept of a moving light box to clarify his objection to the second postulate.
He assumes he is in an inertial frame of reference in which a flash of light is propagated at a point and time in absolute space without knowledge of the motion of that frame relative to the point in space and time where the propagation took place.
He assumes that the point of propagation of light occurs at a fixed point in space at a fixed time regardless of the frame of reference.
Is there actually a point in space where that light is propagated that would be agreed upon by observers in other frames? MD’s answer is yes, if the frames coincided at the instant the light was propagated, then someone moving relative to the rest frame that hosted the point of propagation would see the light propagated at the same point in space and time.
According to the SR postulate that light propagates at c in all frames, we would all agree that the speed of the light observed from all frames as it is emitted propagates at c in all frames. I used “in all frames” three times in the sentence on purpose. The first “in all frames” is part of the postulate. The second “in all frames” is that the light was physically observed to be emitted as an event in all frames that coincided at the point and time of propagation in space. The third “in all frames” was that the light propagated at c in each inertial frame regardless of the relative motion of that frame to the point of emission.
The problem quickly comes to light. If the observers are correct, i.e. that the light was propagated at the same point in space and time in all frames, and if the SR postulate is correct, i.e. that light travels at c in all inertial frames that are moving relative to each other, then in order for the postulate to be true the speed of light would have to be independent of the point of emission unless the point of emission would be considered moving with the motion of the frame of the observer.
In other words there can be no absolute point in space and time according to the postulates of SR. Any point in space that coincides with multiple moving frames at the instant of an event is assumed to be moving with the frames and not fixed at a point in absolute space and time. All frames moving relative to the point in space and time of the event will effectively take their space and time with them as they move away from the coincident point in space.
MD’s Box lays out an alternative postulate. Light propagates at c from the absolute point in space where it is propagated.
His position is that if the light ray (see below *) that is emitted from that absolute point in space is observed from a frame of reference in motion relative to the fixed point of emission in space and time, the speed of the light would be measured at c + or – the difference in the rate of motion between the observing frame and the absolute point in space and time where the emission occurred.
(* or light sphere which is an in-phase composite of rays across a spherical light wave front expanding in space at c in all directions)
This means that MD’s Box is not in line with the terminology of Special Relativity. There is no absolute space or time in SR and there is in MD’s Box scenario.
However, MD says or at least implies that the fixed point in space and time is not an inertial frame; it is a point in absolute space and in absolute time that coincided with an inertial frame at the point in space and time of the light flash.
I come forward to agree that a light ray or expanding sphere of light has a physical presence in space and expands at c from the fixed point of emission in absolute space and time. We have agreed that the light sphere always expands at c relative to the fixed point in space and time, and therefore that point in space and time does not move in empty space or along the time continuum regardless of the motion of the frames that coincided with that point in space at the time of the emission.
My interest in MD’s Relativity of Simultaneity stems from my QWC speculations. 1) In QWC there is an arena process where arenas that emerge from Big Bangs have a fixed point in space from which their arena expansion occurs. Multiple arenas represent multiple fixed points in absolute space and absolute time. 2) Also, in QWC there is a process of quantum action that establishes the physical presence of particles of matter. Quantum action is characterized by high density spots that are fixed in absolute space and time, and the standing wave concept of particles advocated by QWC is completely compatible with the concept of absolute space and time. 3) In QWC gravity is caused by an imbalance between inflowing and out flowing wave energy associated with quantum action that establishes the presence of mass. The notion of absolute points of emission of out flowing gravity waves is completely compatible with the concept of absolute space and time.
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