I've just finished my first year on a Physics degree course at uni, and I'm a bit confused about some of the concepts we've covered. I was hoping someone could straighten things out for me. We were told about wave-particle duality and de Broglie and how he came up with the idea about particles behaving like waves (in the same way that light waves are like 'particles' called photons). We were also taught about wave functions, as in the Schroedinger equation, which, it seems, tell you the probability of finding a particle in any given location. As I understand it, the wave function itself isn't actually 'real', in that it's not a wave that is oscillating through space - all it tells you is the probability of where a particle will be found if you look for it. Is this the only sense in which particles behave like waves? If so, surely that mean that light waves are also just a wave function to tell you where a photon may be? In which case how can it also be an oscillation of magnetic and electric fields? Are de Broglie's waves and wave functions the same thing? Is the 'wave' of 'wave-particle duality' a wave function?