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: A version of spectroscopy that is free of one form of this effect uses a standing wave to give radiation to a moving atom and is named for its two-photon transition. Due to this effect, atoms observe laser resonance leading to the phenomenon of optical molasses at its namesake cooling limit. Mossbauer spectroscopy uses this effect to modulate the energy of the incident gamma rays. An experiment that used a canal ray tube and a mirror to view light emissions was used to detect the transverse form of this effect, while its relativistic form involves changes equal to the square root of one plus beta over one minus beta. For 10 points, name this shift in the wavelength from a moving source that can be heard by an observer.

A: Science
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Q: This philosopher argued that the only way to exercise freedom is to act morally, because otherwise one's actions are bound by one's conditional desires. This thinker defined the title concept of one of his essays as "man's emergence from his self-imposed immaturity." He postulated that our senses perceive only phenomena and not noumena, so we can never truly know the "thing-in-itself." This author of "What is Enlightenment" argued that we should act only according to maxims that could be made universal law, which he called the "categorical imperative." For 10 points, name this German author of Groundwork of the Metaphysics of Morals and Critique of Pure Reason.

A: Social Science
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Q: This composer parodied Richard Wagner's ""Tristan chord"" in a ragtime-inspired movement of a piece meant to evoke childhood. He used a flute solo to open a piece inspired by the frolicking of a Stephen Mallarme (MAH-lar-may) title character. This composer of the Children's Corner also wrote the opera (*) Pelleas and Melisande and a work that depicts the ""play of the waves. "" For 10 points, name French impressionist composer who wrote La Mer and Prelude to the Afternoon of a Faun.

A:
Fine Arts
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