You will be given a definition of a task first, then some input of the task.
In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This person developed a theorem, now named for him and Hendrika Johanna van Leeuwen, stating that magnetism cannot be explained by classical and statistical physics. He is also the namesake of a constant equal to the magnitude of an electron's spin magnetic moment. Early quantum mechanics used models named for Arnold Sommerfeld and this person, based on the idea that electrons have circular orbitals. Werner Heisenberg and this person were associated with the idea that objects governed by quantum mechanics create experimental results dependent on measurement, which was known as complementarity and became known as the Copenhagen interpretation. Name this scientist known for his early quantum model of a hydrogen atom.
Output:
Science