Length contraction: In their common rest frame, two stars are 90.0 light-years (ly) apart. If they are apart as measured by the navigator in a spaceship traveling between them, how fast is the spaceship moving? Express your answer in terms of c.
A) 0.991c
B) 0.986c
C) 0.980c
D) 0.972c

Question

Length contraction: In their common rest frame, two stars are 90.0 light-years (ly) apart. If they are  apart as measured by the navigator in a spaceship traveling between them, how fast is the spaceship moving? Express your answer in terms of c.
A) 0.991c 
B) 0.986c 
C) 0.980c 
D) 0.972c

Quizplus · Accepted Answer

The Answer is A

Length Contraction: in Their Common Rest Frame, Two Stars Are