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.
--------
Question: This man gives his name, along with that of Francis Sears, to a process in ultrasonic imaging for which the acoustic wavefronts act as optical gratings to diffract the light on either side of the central spot. The distance over which charge carriers in plasmas exclude electric fields via his namesake shielding is also known as his namesake length. With an assistant later famous in his own right for his rule for determining whether ring molecules would show aromatic properties, he developed a mathematical expression to explain characteristics of electrolytic solutions, the famous equation named for him and Erich Hckel. FTP name this man who also gives his name to the SI unit defined as about 3.3 x 10-30 Coulomb meters, which measures the molecular dipole moment.

Answer: Science


Question: It holds only when the molecular attraction between different components is equal to the attraction of any one component in its pure state. Dealing primarily with changes in colligative properties, it allows for the calculation of molecular weights of dissolved substances and leads to the definition of a solution as ideal. FTP, identify this law that relates the vapor pressure and mole fraction of a solution, a law named for its French discoverer.

Answer: Science


Question: Indian tribes exclusive to this state like the Nansemond and Nottoway are not among its only two reservations that are held by the Mattaponi and the Pamunkey. This American state has the counties of Prince Edward, Brunswick, and Halifax, all of which predate Canada. Its highest point is Mount Rogers. The state flag of this place has a toga-clad man standing on the chest of a fallen toga-man atop this state's state motto. Historic sites on the Historic Triangle of this state can be found in a part of this state that holds cities such as Poquoson and Newport News, the Hampton Roads area. This Old Dominion state contains Shenandoah National Park. For 10 points, name this state home to Charlottesville and Richmond.

Answer:
Social Science