The effects of relativity, such as the relativity of simultaneity, time dilation, and length contraction, are not solely related to vision or the time it takes for light to reach our eyes. These effects are intrinsic properties of spacetime and occur regardless of whether we observe them visually.
Let's explore each of these effects briefly:
Relativity of Simultaneity: According to special relativity, the concept of simultaneity is relative to the observer's frame of reference. Events that appear simultaneous to one observer may appear non-simultaneous to another observer moving relative to the first. This effect is not solely dependent on vision but is a fundamental consequence of the way spacetime is structured.
Time Dilation: Time dilation is the phenomenon where time appears to pass slower for an object moving relative to an observer. This effect occurs due to the relative motion between observers and is not limited to visual observations. It has been experimentally verified in various contexts, such as high-speed particle accelerators and the operation of GPS satellites.
Length Contraction: Length contraction is the phenomenon where an object moving relative to an observer appears shorter in the direction of motion. Like time dilation, this effect is a consequence of relative motion and is not solely dependent on visual observations.
These relativistic effects are not illusions created by vision or the time it takes for light to reach our eyes. They are fundamental properties of the fabric of spacetime, as described by Einstein's theory of relativity. These effects have been extensively confirmed by experiments and have numerous practical implications in modern physics and technology.