Special Relativity: Train in Tunnel Paradox Solved

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Discussion Overview

The discussion revolves around the classic train in a tunnel paradox from special relativity, focusing on setting up and solving the problem with specific values for multiple observers, including the use of spacetime diagrams.

Discussion Character

  • Homework-related, Exploratory, Technical explanation

Main Points Raised

  • One participant requests help in setting up and solving the paradox with unique values and spacetime diagrams.
  • Several participants emphasize that assistance should come after the requester has made an attempt at solving the problem themselves.
  • Another participant suggests that the requester provide their current level of understanding in physics and mathematics to receive more tailored help.
  • There is a suggestion to search for the "barn and pole paradox" as a related example that may yield numeric illustrations.
  • One participant proposes specific numeric values for the speed of the train and the length of the train, indicating that using light-seconds for distance and seconds for time simplifies calculations.

Areas of Agreement / Disagreement

Participants generally agree that the requester should attempt the problem independently before seeking help. However, there is no consensus on the best way to approach the paradox or the specific examples that should be used.

Contextual Notes

Some participants note the importance of understanding the requester's background in physics and mathematics to provide appropriate resources and guidance.

Who May Find This Useful

Individuals interested in special relativity, particularly those looking for examples and problem-solving techniques related to the train in a tunnel paradox.

Agalal1
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Hello, I was wondering if anyone could set up and solve a classic train in a tunnel paradox from special relativity with unique values for multiple observers including time space diagrams. Thanks
 
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That's not what PF is for. Once you've made an attempt at it we will provide help and feedback. But we aren't here to do your work for you.
 
Ibix said:
That's not what PF is for. Once you've made an attempt at it we will provide help and feedback. But we aren't here to do your work for you.
well i was hoping for different examples i can learn from, would be great if anyone can link me a pdf or a book with examples and answers with space time diagrams
 
Agalal1 said:
well i was hoping for different examples i can learn from, would be great if anyone can link me a pdf or a book with examples and answers with space time diagrams

You'd be better to post what level your physics and maths are and how you are currently learning SR. There are lots of textbooks out there and many threads of recommendations on here.
 
Agalal1 said:
classic train in a tunnel paradox from special relativity

Which is not an "A" level question. Thread level changed to "I".
 
Agalal1 said:
classic train in a tunnel paradox
You might also try searching via e.g. Google for "barn and pole paradox." I would be surprised if this does not find some numeric examples.
 
If you choose to measure distances in light-seconds and time in seconds the speed of light will come out to be 1. Now you can take the speed of the train to be ##\frac{4}{5}=.8## so the ##\gamma## factor will come out ##\frac{5}{3}## and the length of the train to be one light-second.

With these numeric values you'll find that the arithmetic comes out to be really easy.
 

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