Length Contraction & FTL Speeds: Are Lower Grades Faster?

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Discussion Overview

The discussion revolves around the concept of length contraction in the context of faster-than-light (FTL) travel as depicted in science fiction, specifically in the Star Wars universe. Participants explore whether the performance characteristics of fictional spacecraft can be analyzed using principles from special relativity.

Discussion Character

  • Debate/contested, Conceptual clarification

Main Points Raised

  • One participant proposes a hypothetical scenario involving the Millennium Falcon and an X-wing, questioning if length contraction at FTL speeds could explain why a lower class drive appears faster despite being labeled as such.
  • Another participant asserts that discussing FTL travel within the framework of special relativity is incoherent, emphasizing that length contraction applies only to subluminal speeds.
  • A later reply challenges the notion that deriving performance characteristics of fictional spacecraft from relativity is valid, suggesting that such attempts are misguided.
  • Some participants express frustration with the idea of applying real physics to fictional scenarios, arguing that the science in Star Wars is not grounded in actual physics.
  • Despite the skepticism, one participant requests to explore the question further, indicating a desire for a more imaginative discussion rather than a dismissal of the premise.

Areas of Agreement / Disagreement

Participants generally disagree on the validity of applying real physics concepts to fictional scenarios. While some express skepticism about the feasibility of such analyses, others seek to engage with the question hypothetically.

Contextual Notes

The discussion highlights limitations in applying scientific principles to fictional narratives, particularly regarding the definitions and assumptions underlying concepts like length contraction and FTL travel.

Maximum7
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TL;DR
Question on FTL and Length contraction
I’m not a physicist but let’s say hypothetically ;we have the Millennium Falcon. It’s FTL hyperdrive can go Class 0.5 past lightspeed. Then we have an X-wing which has a Class 1 past lightspeed drive. This is all from the lore. MF is 0.5 and X Wing is 1 but MF is faster. Anyway even though the Class 1 is “faster”; is it due to length contraction at FTL that’s make the lower grade drive faster or am I hopelessly off base?
 
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It is impossible to write a coherent description of something traveling faster than light in special relativity, so your question is like asking what colour is an invisible unicorn. There cannot be an answer in terms of relativity. In particular, length contraction is a phenomenon defined between inertial frames, which necessarily do not exceed lightspeed with respect to one another.

Science fiction is not bound by the laws of physics.
 
Moderator's note: Thread level changed to "I".
 
Maximum7 said:
am I hopelessly off base?

In apparently thinking that somebody actually tried to derive the performance characteristics of spacecraft in Star Wars from relativity physics? Yes.
 
PeterDonis said:
In apparently thinking that somebody actually tried to derive the performance characteristics of spacecraft in Star Wars from relativity physics? Yes.

Tons of nerds do this for a living. Trying to make sense of fictional science I always wondered why in Star Wars that 0.5 past lightspeed was faster than 1. Then I was reading about length contraction and then said hmmmm.

I’m not looking for someone to just say “It’s fiction”. Just humor me then.
 
Maximum7 said:
Trying to make sense of fictional science

Is pointless if there is no actual science in the fiction. Star Wars does not have any science in it. They just made stuff up to fit the story.

Maximum7 said:
Just humor me then.

Sorry, we can't answer questions about science that doesn't exist.

Thread closed.
 

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