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

Question

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.

Quizplus · Accepted Answer

Due to length contraction in special relativity, the length measured by Observer A (who sees the ruler moving) will be shorter than the length measured by Observer B (who is at rest relative to the ruler).

Observer a Sees a Ruler Moving by in a Relativistic