Lorentz Transformation Question

In summary, the conversation discusses finding a simple expression for the quantity I in the S' frame, using the Lorentz Transformation. The goal is to show that I and I' are equal, which is noteworthy because it demonstrates the consistency of the Lorentz Transformation.
  • #1
Kunhee
51
2

Homework Statement


For an event occurring at (x,t),
consider the quantity I = x^2 - (ct)^2
Find a simple expression for this in the S' frame: I' = x'^2 - (ct')^2
How are I and I' related, and why is this noteworthy?

The Attempt at a Solution


So the question is under "Lorentz Transformation" and I must
simplify I' = x'^2 - (ct')^2.

I am not sure if this is the way to go about it, but should I find
the equation in the form of "c =" ?
 
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  • #2
You should write x' and t' in terms of x and t by using Lorentz transformations (specifically, what is called a boost in the ##x## direction).
 
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Likes Kunhee
  • #3
When I do, do I find the quantities equal?
 
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Likes Lucas SV
  • #4
I plugged into
I' = x'^2 - (ct')^2

x' = y(x - ct)
t' = y(t - cx/c^2)
* y is Lorentz Factor

and I get that I' = 0
 
  • #5
Kunhee said:
When I do, do I find the quantities equal?
Yes, you should find that they are equal, I=I'. You got 0 because you wrote c instead of v in the Lorentz transformations. They are:

x' = y(x - vt)
t' = y(t - vx/c^2).
 
  • Like
Likes Kunhee
  • #6
I see, thank you!
 

1. What is the Lorentz Transformation?

The Lorentz Transformation is a mathematical formula that describes how measurements of space and time change between two reference frames that are moving at a constant velocity relative to each other. It is an important concept in the theory of special relativity, which explains the relationship between time, space, and the speed of light.

2. Why is the Lorentz Transformation important?

The Lorentz Transformation is important because it allows us to understand how measurements of space and time are affected by motion. It also helps us reconcile discrepancies between the laws of physics in different reference frames, and has played a crucial role in the development of modern physics and technologies such as GPS.

3. Who developed the Lorentz Transformation?

The Lorentz Transformation was first developed by Dutch physicist Hendrik Lorentz in the late 19th century. It was later refined and mathematically formalized by Albert Einstein in his theory of special relativity.

4. What is the difference between the Lorentz Transformation and the Galilean Transformation?

The Galilean Transformation is a simpler formula that describes how measurements of space and time change between two reference frames that are moving at a constant velocity relative to each other, but does not account for the speed of light. The Lorentz Transformation, on the other hand, accounts for the speed of light and is used in situations where objects are moving at speeds close to the speed of light.

5. How is the Lorentz Transformation used in everyday life?

The Lorentz Transformation has many practical applications in everyday life, such as correcting for time dilation in GPS technology and understanding the effects of high-speed travel on human perception of time. It also helps scientists make accurate measurements and predictions in fields such as astrophysics and particle physics.

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