Duda Jarek Posted April 30, 2021 Share Posted April 30, 2021 (edited) Optical photon is produced e.g. during deexcitation of atom, carrying energy, momentum and angular momentum difference. So how is this energy distributed in space - what is the shape and size of single photon? Looking for literature, I have found started by Geoffrey Hunter, here is one of articles: "Einstein’s Photon Concept Quantified by the Bohr Model of the Photon" https://arxiv.org/pdf/quant-ph/0506231.pdf Most importantly, he claims that such single optical photon has shape similar to elongated ellipsoid of length being wavelength λ, and diameter λ/π (?), providing reasonably looking arguments: Quote Its length of λ is confirmed by: – the generation of laser pulses that are just a few periods long; – for the radiation from an atom to be monochromatic (as observed), the emission must take place within one period ; – the sub-picosecond response time of the photoelectric effect ; 2) The diameter of λ/π is confirmed by: – he attenuation of direct (undiffracted) transmission of circularly polarized light through slits narrower than λ/π: our own measurements of the effective diameter of microwaves [8,p.166] confirmed this within the experimental error of 0.5%; – the resolving power of a microscope (with monochromatic light) being “a little less than a third of the wavelength”; λ/π is 5% less than λ/3, ; Is it the proper answer? Are there other reasonable answers, experimental arguments? Edited April 30, 2021 by Duda Jarek Link to comment Share on other sites More sharing options...
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