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Which phenomenon causes increased duration in a GPS satellite's clock?

A)Gravitational time dilation
B)Atmospheric index variation
C)Relativistic length contraction
D)Quantum entanglement fluctuation

💡 Explanation

GPS satellites experience weaker gravitational fields than Earth's surface; therefore, gravitational time dilation causes their clocks to tick slightly faster. The lower gravitational potential results in spacetime distortion shifting the clocks toward "faster", rather than slowing them.

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