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michael879
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This thread was snipped and moved from the thread "conflict between electrodynamics and classical relativity" orignally posted by michael879.
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Mentz114 said:I do not agree that the first principle of SR can be deduced from Maxwell's equations.
Do you understand that in general, when calculating the behavior of moving objects, there is no need to use multiple frames?
Mentz114 said:But you guys are using post-Einstein ideas, mainly 'no aether'.
We're talking about moving charges. Do you think Maxwell's laws are incapable of predicting the speed of electromagnetic waves emitted by an oscillating charge whose average position (i.e. not worrying about the small motion caused by the oscillation) is moving in the frame you're using (the frame where you assume Maxwell's laws are correct), without transforming into the frame where the charge's average position is at rest? Do you think that in order to calculate the magnetic field of a moving charge, you need to transform into a frame where it's at rest? Maxwell's laws work just like classical dynamics or every other set of laws in physics--you never need to switch reference frames to predict what will happen, although in some cases it might make the math simpler.Mentz114 said:No. We're not talking about moving objects or collisions but light being emitted.
In relativity, yes. But before relativity, physicists imagined that Maxwell's laws wouldn't work in that guy's frame unless he was at rest relative to the aether.Mentz114 said:In the frame of the guy lighting the candle Maxwells laws work and the speed of the light is c in that frame.
alvaros said:In Maxwell laws, what does x mean ?
Supose a photon emitted by an atom.
The atom is moving in relation to other atom buts it is at rest respect to
another one.
The photon is an entity different from the atoms ( It has energy, wrote
Einstein ).
The photon ( or the wave ) is moving in relation to what ? To itself ?
May be the atoms disappear after the photon is created.
I think this is basic for all the argument of ( special ) relativity
and I wish to find a link where this is explained ( whithout complex
numbers ).
If somebody could help me, thanks.
Aren't you disagreeing about Maxwell's laws, though? You seemed unconvinced that Maxwell's laws could give you the speed of an electromagnetic wave from a moving emitter without the need to transform into the emitter's frame, and you also seemed unconvinced that Maxwell's laws demand the speed of the wave from a moving emitter would be c in any frame where these laws hold.Mentz114 said:Guys, please lay off me ! I'm not disagreeing with anything you say. We were talking about how these ideas evolved - I hope there's no argument about relativity going on here.
It would greatly enhance my education to see this properly demonstrated - with a luminiferous aether and pre-SR concepts.Posted by JesseM
Maxwell's laws demand the speed of the wave from a moving emitter would be c in any frame
Maxwell's laws are just defined by a set of equations (relating the electric field, the magnetic field, and the distribution and motion of charge), they have nothing to do with whether you believe in aether or not. The aether concept is just the idea that these equations are only obeyed in the rest frame of the aether, and in other frames electromagnetism would obey different equations (Maxwell's laws modified by a Galilei transformation). Relativity says that these equations are obeyed in every inertial frame.Mentz114 said:It would greatly enhance my education to see this properly demonstrated - with a luminiferous aether and pre-SR concepts.
The relative speed of a photon is always the speed of light, which is approximately 299,792,458 meters per second in a vacuum.
The speed of a photon is significantly faster than the speed of any other known particle. This is because photons have no mass and therefore are not limited by the laws of relativity that apply to particles with mass.
No, the relative speed of a photon is constant and does not change. However, the speed of light can be affected by the medium it is traveling through, causing it to slow down or speed up slightly.
The relative speed of a photon is significant because it is the fastest known speed in the universe and plays a crucial role in theories of relativity and the behavior of light in various phenomena, such as the Doppler effect and gravitational lensing.
The relative speed of a photon is measured using various techniques, including interferometry, which involves splitting a beam of light and then recombining it to measure the difference in travel time, and time-of-flight measurements, which use the time it takes for a photon to travel a known distance to calculate its speed.