IN RECENT YEARS Alfred Landé has tried to give a new foundation for quantum theory, starting with statistical nonquantal principles that have not been taken from classical physics. In his books and articles he attacks the basic concept of quantum theory that is generally taken for granted by most physicists nowadays. He calls this concept “dualistic” and maintains that he can replace it by another more unified one.
Do particles sometimes behave as waves? Can waves be treated as particles? There is still disagreement in the interpretation of the quantum theory.