Can Relativity Explain the Changing Size of Babylon 5 Space Station?

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Homework Help Overview

The discussion revolves around the relativistic effects on the observed size of the Babylon 5 space station as perceived by different observers, specifically in the context of a Vorlon vessel traveling at a significant fraction of the speed of light and a Starfury moving towards it. The problem involves concepts from the theory of relativity.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster seeks clarification on the meaning of "observed size" and how to approach relativistic addition of velocities. Some participants discuss the formula for relativistic velocity addition and its relevance to the problem.

Discussion Status

The discussion is ongoing, with participants exploring the necessary concepts and formulas related to relativistic effects. There is a focus on understanding how to determine the observed size of the space station from different frames of reference, though no consensus has been reached on the specific approach to take.

Contextual Notes

Participants are navigating the complexities of relativistic physics, particularly in relation to the velocities involved and the implications for measurements of size. There is an emphasis on the need for clarity regarding the observers' speeds relative to the space station.

wowolala
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Homework Statement



A Vorlon vessel traveling at a speed of 0.975c passes by the Babylon 5 space station( engineers that designed the station quote its length at 8.0645km).

A Starfury is released from the space station moving with a speed of 0.2c towards the incoming Vorlon vessel.

What is the observed size of Babylon 5 space station for all observers involved?


for " observed size", does it mean the length of space station...

how can i do the addtion in relativistic situation?

thx, i need help from you guys


thx so much
 
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wowolala said:
for " observed size", does it mean the length of space station...
Yes, as measured by each observer.
how can i do the addtion in relativistic situation?
What addition?
 
V1+V2=(V1+V2)/(1+V1*V2/c^2)

do we need to use this formula

V stands for speed
 
You'd need that formula for relativistic addition of velocity if you wanted to find the relative velocity of the Vorlon vessel and the Starfury. But that's not relevant here.

Since you're asked to find the observed size of the space station, you need the speed of the observers relative to the space station.
 

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