Science
What Happens to a Clock Moving Near the Speed of Light?
According to special relativity, what happens to the ticking rate of a clock moving at nearly the speed of light compared to a stationary clock?
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What is the answer to this special relativity clock question?
It ticks slower. A clock moving close to the speed of light runs slower than a stationary clock, an effect called time dilation.
Why does a fast-moving clock tick slower?
Special relativity says time itself runs slower for objects moving at very high speeds relative to an observer. This has been confirmed using atomic clocks flown on aircraft.
Is time dilation real or just theory?
It is real and measurable. Atomic clocks carried on planes and satellites tick at slightly different rates than clocks on the ground, exactly as Einstein predicted.