Observer a Sees a Ruler Moving by in a Relativistic

question 10

Multiple Choice

Observer A sees a ruler moving by in a relativistic train and measures its length to be L_A. Observer B moves together with the train and measures the length of the ruler to be L_B. These two results will be such that

• 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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Definitions:

Peer Contributions

Efforts or input provided by individuals at the same level within an organization or group toward a common goal.

Scientific Method

A systematic, evidence-based approach for conducting research, involving observation, hypothesis formation, experimentation, and conclusion.

Independent Variables

Are presumed causes that influence dependent variables.

Dependent Variables

Outcomes of practical value and interest that are influenced by independent variables.