|MadSci Network: Physics|
I'm not looking for the simplistic Lorentz contraction answer of zero. It takes a finite interval of time for an atomic electron to emit a photon, and l = c t. Thanks. P.S. I saw the answer to the question "What is the smallest known particle at present?". I think the answer would probably best refer to the particle's cross-section: the neutino.What is the smallest known particle at present?
Re: What is the length of a photon?
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