The Evidence for Time Dilation
What if relativity correctly describes observations, but we misinterpret the information? Let me explain, but first, let’s look at some examples.
Modern evidence for Einstein’s theory of relativity.
The Hafele-Keating experiment showed that atomic clocks on airplanes changed relative to reference clocks on the ground.
Later, GPS clocks, which travel much faster, multiplied the results of the early experiment by showing they ran 38 microseconds per day faster than reference clocks. Thus, to remain accurate, the clocks require daily corrections.
The Muon phenomenon took time dilation to a new level, showing that time slows down dramatically when an object travels near the speed of light. Muons are charged particles that are created in the upper atmosphere and travel about 99% of the speed of light.
However, the half-life of muons is too short for them to reach the ground. Standard relativity explains that the faster an object moves, the slower time passes for it, or, alternatively, that distances shrink.
But another possibility is that the physical processes governing particle decay are altered by extreme motion, while time itself remains unchanged.
Thus, when a GPS clock runs faster or time for a muon slows down, does time itself change?
However, when clocks tick faster or slower, aren’t they simply counting their mechanisms at a faster or slower rate? We interpret it as time changing, but we never directly observe “time.”
Every measurement of time ultimately depends on a physical process. If clocks are altered by motion and gravity, does that prove time itself is altered?
The distinction is between a clock’s mechanism and whether fundamental forces affect clocks. The question remains whether “time itself” is affected by physical activity.
And if we use clocks to measure the speed of everything, how is it possible to measure time itself?