As we all know, photons show dual character, but do they behave both ways at the same time? Then how do they propagate just like other particles do and combined with wave motion?
[Physics] Does photon behave both wave like and particle like at the same time
electromagnetic-radiationphotons
Best Answer
Well, according to Heisenberg in his essay named "The physical principles of the quantum theory", the answer is more complicated that it looks. He wrote, and I agree, that our language is conditioned by our macroscopic experience. In this scale the concepts of wave and particle are perfectly defined. In the quantum world, that is, with energy on the order of the $\hbar$ (the Planck's constant) or the respective longitudinal dimensions, "waves" and "particles" start to loose their meanings, the same with "trajectory" (a concept, by the way, fundamental in the definition of particle). The answer, once we understand this, is: there exist phenomena that in certain conditions seem like waves or particles: We can't just ensure that, in fact, the physical quantum objects are waves or particles.