Photons and free quantum particles

  • Context: Undergrad 
  • Thread starter Thread starter hokhani
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hokhani
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TL;DR
Are photons localised?
Consider a light source, like lamb, that radiates photons in vacuum. Can we detect a particular photon, moving in a specific direction, always at one point or the photon is localised and moves from one point to another? In other words, I would like to know that like free quantum particles, photons also have the probability of presence everywhere?
 

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