BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Marian Kowalski (Ontario Tech University) DTSTART:20220609T150000Z DTEND:20220609T170000Z DTSTAMP:20260423T011112Z UID:QMFNoT/35 DESCRIPTION:Title: The semi-classical\, quantum and EM process of photon emission by the H at om\nby Marian Kowalski (Ontario Tech University) as part of QM Foundat ions & Nature of Time seminar\n\n\nAbstract\nLight emitted from atoms duri ng transitions of electrons from higher to lower discrete states has the f orm of photons carrying energy and angular momentum. The paper considers t he process of emission of a single photon from the hydrogen atom by using quantum theory and Maxwell's equations. The electric and magnetic fields o f a photon arise from the time-dependent quantum probability densities of the orbit and the spin current. This paper is an extension of the semi-cla ssical description of photon emission published by the author earlier in 1 999. In the semi-classical approach the Coulomb force and a radiation resi stance force have been taken into account to get time dependent emission o f the photon. In both the quantum and semi-classical cases the transition takes place within a time interval equal to one period of the photon's wav e. The creation of a one-wavelength-long photon is supported by the result s of experiments using ultra-fast (ultra-short) laser pulses to generate e xcited atoms\, which emit light pulses shorter than two photon wavelengths .\n LOCATION:https://researchseminars.org/talk/QMFNoT/35/ END:VEVENT END:VCALENDAR