Length Contraction: Observer A sees a ruler moving by in a relativistic rocket and measures its length to be LA. Observer B moves along with the rocket and measures the length of the ruler to be LB. What is true about these two length measurements?
A. LA > LB
B. LA = LB
C. LA < LB
D. LA could be greater or smaller than LB depending on the direction of the motion.
Answer: C
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