Clocks running slower is an illusion

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SUMMARY

The discussion centers on the concept of time dilation in Special Relativity (SR) and whether it is an illusion or a measurable effect. Participants assert that time dilation is a coordinate-dependent effect that can be observed and measured, particularly in scenarios involving acceleration or gravitational fields. The debate highlights the semantic differences in interpreting the term "illusion," with some arguing that while time dilation is not an illusion, it is perceived differently depending on the observer's frame of reference. The example of muon decay at Brookhaven National Laboratory is cited as a definitive measurement supporting the reality of time dilation.

PREREQUISITES
  • Understanding of Special Relativity (SR) principles
  • Familiarity with the concept of time dilation
  • Knowledge of inertial and non-inertial reference frames
  • Basic grasp of experimental physics, particularly regarding particle decay
NEXT STEPS
  • Research the implications of time dilation in high-speed particle physics
  • Explore the role of acceleration in time dilation effects
  • Study the concept of proper time and proper interval in SR
  • Investigate the experimental evidence for time dilation, such as muon decay experiments
USEFUL FOR

This discussion is beneficial for physicists, students of relativity, and anyone interested in the nuances of time perception in different reference frames, particularly in the context of Special Relativity and its implications in modern physics.

  • #31
Oh, I see. I'll have to read up more on Epstein diagrams. Just found another link here:

http://www.relativity.li/en/epstein2/read/

I've met the idea of 4-velocity, but haven't really looked at alternative visualisations to Minkowski's yet.
 
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  • #32
kev said:
Where two frames are moving relative to each other and remain strictly inertial (no acceleration) then perhaps in some sense the mutual time dilation is illusional because there is no absolute way to determine which clock is running slower than the other.
I don't think that's true kev. You could video tape (or digitally record) the action going on inside a close to c spaceship then examine it later when the ship is back on earth. Or transmit the digital data as a short burst of information (to avoid doppler complication). The ticking of time observed would be absolute, and should according to SR be equal to 1s/s - ie the same as on earth.

The ticking of time when observed through an Earth based stationary telephoto camera tracking the spaceship occupants throgh a side window should be time dilated acording to SR. So theoretically it could be tested - just not with todays technology, since we can't get spaceships close enough to c that's all.
 

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