Observer a Sees a Ruler Moving by in a Relativistic

question 22

Multiple Choice

Observer A sees a ruler moving by in a relativistic rocket and measures its length to be L_A.Observer B moves along with the rocket and measures the length of the ruler to be L_B.What is true about these two length measurements?

• A)L_A > L_B
• B)L_A = L_B
• C)L_A < L_B
• D)L_A could be greater or smaller than L_B depending on the direction of the motion.

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