hi, i am in year 13 of school, so i would appreciate it if any responses to this question weren't too far over my head. saying that i have a fairly decent back ground knowledge of some of these ideas. so, we have learnt about the whole lead up to deciding photons etc. are not waves or particles but rather a mix that contains properties of both. eg young's double slit experiments and the photo electric effect. we also have learnt about relativity, but in less detail than i would have liked. so my question is this; what is the significance of wave-particle duality for special relativity? the two ideas seem closely linked, but all the discussions i have read quickly indulge in quantum physics that i have very limited knowledge of. so any explanations as to why these two ideas are linked and what there implications upon each other, would be really helpful :) thanks, sorry if that was a bit long and waffley.