As an electron has mass, it cannot be infinitesimal since that would imply infinte density - infinities are evenless palatable than infintesimals!
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The answers I have been getting refer to measurig the energy of particular types of photons in particular sets of circumstances. Nothing like a generalised PhotonMeter that I would have thought would have been dead easy to construct.
ps I would prefer to be referred to as mxplxxx rather than the very unfriendly "the questioner"
. Currently, humans are the most advanced level of consciousness biological beings.
Quote from: AlanDepends on the nature of the interaction. At low photon energies the photon generally disappears into heat, a chemical change, or the movement of charge in an electrical circuit, but at energies above the visible spectrum you can get all sorts of secondary emission including photonuclear reactions.
What is the likelihood that emissions arising from these interactions would influence the original beam?
Would there be any effect other than "attenuated intensity"?
We use all kinds of filters to remove photons of specific energies from a beam to produce a more monoenergetic (monochromatic) beam of lower intensity.
Experience teaches that trying to forge any kind of link between this sort of mathematical concept and the “real world” leads nowhere.