RE: Matter waves - a central concept in quantum mechanics
Fantastic summary of wave-particle duality. I remember first learning about this in one of my college physics courses and everyone in the class was trying to make sense of it. Perhaps if it we're just confined to light, we could pass it off as some weird property, but for experiments to show that electrons and atoms exhibit the same pattern is spectacular. It is right up there with time dilation and black holes for me when it comes to the most fascinating discoveries in science.