Time is unidirectional..I would also posit that time is actually a constant..
It is only in a relativistic sense that time is "perceived" as moving faster or slower..
Should we understand you to mean that you deny that photons experience no lapse of time?
I think we will find that the speed of light itself is not the constant we believe it to be..
It can be surpassed..
The constancy of the speed of light in a vacuum is a cornerstone of special relativity, an experimentally well-tested theory that we've found no cause to emend just yet. You may recall, though, that light has been slowed to a stop in recent laboratory experiments. Only tachyonic stuff could exceed the speed of light in a vacuum, and we've seen no evidence of such stuff so far.
Not sure.. When I said time is percieved in a relativistic sense, I was referring to human perception..
As to photons, I am unsure whether they "perceive" anything at all..
A photon is however, a light energy particle..
It is energy being transferred by a source to a "target" although not in the sense of an intended destination, but in the sense that anything that finds itself in the path of that energy will become the recipient..
I can imagine the photon experiences it's ejection from the source, and the impact on the target, but does not actually percieve a passage of time until impact occurs. I would best describe the interim passage as a state of flux..??
That's probably a weak explanation but it's the best I can do..
Of course, that depends on whether a photon's energy state remains constant or if it degrades with distance..
If entropy applies to photons then it would "experience" time as it grows older and weaker, eventually dying.. Maybe "flashing" out of existence, like a tiny, photonic supernova..
The constancy of the speed of light in a vacuum is a cornerstone of special relativity, an experimentally well-tested theory that we've found no cause to emend just yet.
It was once explained to me that two objects, both travelling at the speed of light and travelling on a direct path toward each other are still approaching each other at the speed of light, not twice the speed of light..
Special Relativity is indeed special if 1 + 1 does not equal 2..
I think that it will be found that special relativity does not always apply.. That there are states, dimensions, circumstances, applications, where the speed of light will not apply, or those "limits" can be adjusted.. Or simply bypassed completely....
It's not something I can adequately explain, but I have always felt that there were problems with Special relativity..