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← ScienceWhich mechanism causes lengthening signal delays across Earth-orbiting satellites?
A)Gravitational time dilation (Shapiro delay)✓
B)Atmospheric signal dispersion
C)Quantum entanglement interference
D)Kinetic Doppler frequency shift
💡 Explanation
Gravitational time dilation causes signal delays because general relativity dictates variations in spacetime near massive bodies; therefore, light traveling through stronger gravitational fields experiences Shapiro delay, rather than solely atmospheric effects or Doppler shifts because those are independent phenomena.
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