B Problem about postulate of the invariance of the speed of light

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The discussion centers on the postulate of the invariance of the speed of light and the interpretation of redshift. Participants clarify that redshift occurs due to the increasing distance between a moving observer and a light source, not because light travels slower relative to the observer. They emphasize the distinction between separation rate and relative velocity, asserting that while relative velocity never exceeds the speed of light, the observed redshift can occur even at constant relative velocities. Misunderstandings about the nature of light propagation and the classical Doppler effect are addressed, highlighting that redshift does not imply a change in light speed. Ultimately, the conversation reinforces the compatibility of relativity with the constant speed of light.
  • #31
externo said:
The question is: is space-time Minkowskian or euclidean ?

Answer from Minkowski:

Wikipedia said:
Minkowski argued that Lorentz's introduction of the contraction hypothesis "sounds rather fantastical", since it is not the product of resistance in the aether but a "gift from above". He said that this hypothesis is "completely equivalent with the new concept of space and time", though it becomes much more comprehensible in the framework of the new spacetime geometry.
Source:
https://en.wikipedia.org/wiki/Lorentz_ether_theory#Special_relativity
 
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  • #33
The advantages or disadvantages of LET are off topic for this thread and further posts on its virtues or problems will be deleted. This thread is about the relativistic Doppler effect which can be analyzed using LET or not, as desired without arguing either for or against LET.
 
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