Which one of the following statements concerning time dilation is true?

Question

Quizplus · Accepted Answer

Time dilation has been observed in experiments involving both atomic clocks and radioactive decay processes. This is one of the most well-established predictions of special relativity, and has been confirmed through numerous experiments over the past century. In these experiments, time is observed to pass more slowly for objects that are moving relative to an observer, or are in a strong gravitational field. This effect has important implications for the behavior of subatomic particles, GPS satellites, and other systems that rely on precise timekeeping.

Which One of the Following Statements Concerning Time Dilation Is