A computer teacher on a physics roll here?

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SUMMARY

The discussion centers on a computer teacher's assertion that magnetism can be harnessed for superluminal travel, specifically using planetary magnetic fields as energy sources. Participants argue against this claim, citing the principles of Special Relativity (SR) which categorically state that superluminal travel is impossible. A compelling counterargument is presented involving the transmission of a binary message via charged particles traveling faster than light, illustrating the paradox of causality that arises from such a scenario. The consensus emphasizes the need for a solid understanding of SR to debunk the teacher's claims effectively.

PREREQUISITES
  • Understanding of Special Relativity (SR)
  • Knowledge of magnetic fields and their properties
  • Familiarity with charged particle dynamics
  • Basic principles of causality in physics
NEXT STEPS
  • Study the implications of Special Relativity on superluminal travel
  • Research the properties of magnetic fields in physics
  • Explore charged particle acceleration techniques
  • Examine causality and its role in physics
USEFUL FOR

Physics students, educators in the field of science, and anyone interested in the principles of relativity and the limitations of superluminal travel.

Imparcticle
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A certain teacher at my school who teaches compters always says "Magnetism is the future". He says that by utilizing the magnetic fields of planets as "energy boosts or a trampoline" for travel at c+. I explained this is impossible, according to SR a while back, but I backed off (because he was very determined in his idea). But now, I need a really compelling argument. So, anyone here want to help?
 
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Sure. Try this: Alright, suppose you somehow manage to extract energy from a magnetic field by allowing it to accelerate a charged particle. Even better, a stream of charged particles carrying a message in binary. Suppose it travels at 1.2c and arrives in the radios of some friendly aliens at Proxima Centauri, about 4 light years distant. They, then, observe an effect (the signal) preceeding a cause (the use of the magnetic field to send the signal), which is of course impossible.

In a good SR textbook, there are more elaborate examples of why superluminal travel is impossible.
 

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