instruction:
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:
The beneficial type of this concept would be produced by such factors as the development of an AIDS vaccine, a better educational system, or a more efficient highway system. Costs of this type are not factored into the GDP; therefore, the GDP overstates economic welfare. FTP, name this economic concept in which a third party is affected by production or consumption of a commodity.
answer:
Social Science

question:
The Stratton-Chu model of this phenomenon attempts to improve on earlier scalar models such as the Rayleigh-Sommerfeld theory. The equivalence of complementary arrangements in producing this phenomenon is described by Babinets principle. A simple scalar theory of this phenomenon makes use of an integral named for Kirchhoff and Fresnel, and a simple pictorial model of this phenomenon is given by Huygens principle of wave propagation. FTP name this behavior observed in electrons by Davisson and Germer, the bending of waves as they pass obstacles.
answer:
Science

question:
One of this hero's rampages was stopped when a troop of topless women forced him to avert his eyes, which had seven pupils apiece. He stood alone against an invading army commanded by a queen noted for her friendly thighs while his countrymen suffered from a curse which made them feel the pangs of birth. He was doomed after breaking a geis by eating dog meat given to him by the Morrigan. He used the gae bolg to kill his friend Ferdiad and his son Connla despite the protests of his wife Emer. Known for defending Ulster during the Cattle Raid of Cooley, FTP name this Irish hero, born Setanta, who acquired a new name after killing the hound of Culainn.
answer:
Social Science