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Thanks for your comments. In reply:
If a spacecraft was travelling from the neighbourhood of the sun to earth at 10% of the speed of light the occupants and onboard clock would experience/measure about 8 minutes. If it travelled faster at 99% of the speed of light, due to time dilation, the clock would measure show about 1 minute of elapsed time. If it travelled even faster at 99.9999% of the speed of light, the clock would show the journey taking only 1 second. Consequently photons, that travel at the speed of light, would be expected to ‘experience’ zero time and instantaneous travel time.
Physicists and philosophers have been unable to define time, other than to observe it represents the change of something – tick of a clock, heart beats etc. Some physicists start their theories by assuming that we live in an arena of space and time. Special and general relativity show there is no absolute time. IMHO Time is an emergent phenomenon from quantum mechanics. What changes is the decoherence of the wavefunction. This is consistent with the photon travelling instantaneously until it hits something, is measured or otherwise decoheres. Decoherence is the key to understanding time. This applies to all massless particles that travel at the speed of light. Other particles couple or interfere with the Higgs Field. The more they couple, the more decoherence happens, and more time they experience. This slows them down from the speed of light. The particles that experience the most decoherence slow down the most. This appears has if they have more inertia. This ones with most inertia appear to us as having the greatest mass. This is how mass arises and varies between particles.
I believe this real physics, hopefully leading to a better understanding of space and time, gravity, mass etc.
I am hoping for some constructive replies. Thanks
Physics aside do you agree with the philosophy of Now as described by Mindfulness, Buddhism or Eckhart Tolle's Power of Now? Thanks
Time is not an illusion but an emergent phenomenon than appeared shortly after the Big Bang.