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.
Q: Unlike its partner, it does not change sign under spatial reflection, though it does change sign under time reflection, and its boundary conditions stipulate that its normal component must be continuous across a boundary between media. The great strength of this property for a neutron star results in the formation of two "hot sports" on its surface and is responsible for the short timescale of a neutron star's rotational damping. A spin will precess around an applied one, and an equation which states that it is divergence-free indicates that classically, its monopoles do not exist. FTP identify this physical quantity whose behavior is governed by such equations as Ampere's law, the dual of the electric field.
A:
Science