Chapter 25, Problem 19QAP

To determine

Which atomic clock runs slow according to the general theory of relativity if 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),

A. The clock in Colorado runs slow.

B. The clock in orbit runs slow.

C. The clocks keep identical time.

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

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