Lorentz's Derivation: A Historical Exploration

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In summary, Lorentz's derivation of the special theory of relativity assumed a constant speed of light, but only for electromagnetic waves. However, this did not explain the connection between the constant speed of light and the motion of massive bodies. It was not until Einstein introduced the postulate of one way constancy of light speed that this issue was resolved. References such as David Bohm's "The Special Theory of Relativity" and Peter Bergmann's "Introduction to the Theory of Relativity" can provide a deeper understanding of the steps involved in Lorentz's derivation.
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yogi
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I came across a paper recently that discussed the procedure Lorentz followed in his derivation, but it was incomplete. Does anyone have a reference that reproduces his steps - what got me wondering is how could Lorentz arrive at the same form as Einstein w/o impliedly introducing the postulate of one way constancy of light speed
 
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Lorentz derivation

yogi said:
I came across a paper recently that discussed the procedure Lorentz followed in his derivation, but it was incomplete. Does anyone have a reference that reproduces his steps - what got me wondering is how could Lorentz arrive at the same form as Einstein w/o impliedly introducing the postulate of one way constancy of light speed

I think a look at
David Bohm, The Special Theory of Relativity, (Routledge Classics 1996) will help.
 
  • #3
Something to be found in Peter Bergmann, "Introduction to the Theory of Relativity," on page 45-46. Goes through various steps and the last one is:

"To the student, "Find out how moving clocks in the starred (moving through the either) system must be adjusted so a signal spreading in all directions from the starred point of orgin must be adjusted to have the apparent speed c in all directions."

The word "apparent" is important in that, since it was an "imaginary" system. Lorenz himself stated, "There existed for me only this one true time. I considered my time transformation only as a heuristic working hypothesis."
 
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The Lorentz derivation DID assume a constant speed of light. BUT it only held for electromagnetic waves. It did not make the needed connection between the then known constant speed of light and the motion of massive bodies.

Do not forget that in the last half of the 19th century even the common man on the street was aware that light (electromagnetic radiation) behaved differently from massive objects. This disconnection was the major issue of Physics in that era. Kind'a like the space program of today, it was a popular topic of the media and was discussed by laymen.
 

FAQ: Lorentz's Derivation: A Historical Exploration

What is Lorentz's derivation and why is it important?

Lorentz's derivation, also known as the Lorentz transformation or Lorentz-Einstein transformation, is a mathematical framework that describes how space and time are affected by the relative motion between two observers. It is important because it forms the basis for Einstein's theory of special relativity and has many practical applications in modern physics.

Who was Hendrik Lorentz and what was his contribution to this derivation?

Hendrik Lorentz was a Dutch physicist who developed the Lorentz transformation in 1904, before Einstein published his theory of special relativity. Lorentz's contribution was in understanding the effects of motion on the fundamental laws of physics, particularly in relation to the concepts of time and space.

How did Lorentz's derivation lead to the development of Einstein's theory of relativity?

Lorentz's derivation was based on the concept of the ether, a hypothetical medium that was thought to fill all of space. However, Einstein's theory of special relativity did not rely on the existence of the ether and instead proposed that the laws of physics were the same for all observers regardless of their relative motion. Lorentz's derivation was an important precursor to Einstein's theory, providing a mathematical framework for understanding the effects of motion on space and time.

What are some practical applications of Lorentz's derivation?

Lorentz's derivation has many practical applications in modern physics, including in the fields of particle physics, astrophysics, and engineering. Some examples include the design of particle accelerators, the calculation of time dilation in GPS systems, and the understanding of relativistic effects in high-speed travel.

What are some criticisms of Lorentz's derivation?

One criticism of Lorentz's derivation is that it was based on the concept of the ether, which has since been disproven by modern physics. Additionally, some argue that Lorentz's derivation was not a complete description of the nature of space and time, as it did not fully account for the effects of gravity. However, despite these criticisms, Lorentz's derivation remains an important and influential concept in the history of physics.

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