Who measures the proper length of the journey from Earth to Planet X? - ProProfs Discuss
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Who measures the proper length of the journey from Earth to Planet X? A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light.



A. Pilot on space ship
B. Observer on the Earth
C. Independent observer
D. Great Galactic time measurer

This question is part of H3 Time dilation, length contraction
Asked by Gboulton, Last updated: Mar 04, 2020

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1 Answer

John Smith

John Smith

Answered Jan 17, 2017

Observer on the Earth
 

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