Photon is a Particle
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This page enumerates the positive and negative statements in discussion of the assertion that a Photon is a Particle.
Positive
The Compton effect show that when the photon hits an object, it passes momentum to that object.
Negative
It is not possible to know where a photon in motion actually is (The Heisenberg Uncertainty principle).
It travels all the paths from origin to destination
It travels only the path with the shortest time between o and d
