Special & General Relativity Questions and Answers
Do time and space become meaningless at the speed of light?
I have never really thought about this. Clearly, time and space are still valid concepts for a photon traveling from the Sun to your eyeball! As to what anything would experience traveling at the speed of light in terms of time and space is an impossible question to answer. It would be identical to asking what neurotransmitter molecules experience as they jump a synapse and help create a brilliant thought.
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All answers are provided by Dr. Sten Odenwald (Raytheon STX) for the NASA Astronomy Cafe, part of the NASA Education and Public Outreach program.