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.Who measures the proper length of the journey from Earth to Planet X?
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: Apr 19, 2018