Consider two atomic clocks, one at the GPS ground control station near Colorado

Question

Consider two atomic clocks, one at the GPS ground control station near Colorado Springs (elevation 1830 m) and the other one in orbit in a GPS satellite (altitude 20,200 km). According to the general theory of relativity, which atomic clock runs slower?

A) The orbiting clock alternately runs slow and then fast depending on where the Sun is.

B)The orbiting clock is 95% slower than the clock in Colorado.

C) The clock in Colorado runs slow.

D) The clocks keep identical time.

E) The clock in orbit runs slow.

Explanation / Answer

C. As weaker the gravity, faster time moves.

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