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.
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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: Some of this man's later works were created for television, including a score for the 1942 adaptation of his opera The Pilgrim's Progress as well as an adaptation of his seventh symphony for Scott of the Antarctic. His first choral symphony is a setting of parts of five Walt Whitman poems, including "A Song For All Seas, All Ships. " This mans operas also include one featuring a prize fight between the title character and John the butcher, as well as a direct adaptation of a J.M. Synge play. Hugh the Drover and Riders to the Sea were composed by, FTP, which British composer, who also created The Lark Ascending, the London Symphony, and Fantasia on a Theme of Thomas Tallis

Answer: Fine Arts

Question: When it interacts with ryanodine receptors, this element upregulates its own release, and this compound forms the cell plates of coccolithophores. Stimulation of Gq ("g-sub-q") opens a channel that allows for this ion's movement, and proteins that bind this ion have an EF hand motif. Cellular concentrations of this ion are regulated by IP3. Parafollicular cells of the (*) thyroid produce a compound that reduces the concentration of this ion in blood, and its intestinal absorption requires vitamin D. This ion interacts with Troponin to stimulate muscle contraction, and the lumens of sarcoplasmic reticula have high concentrations of this ion. For 10 points, name this divalent cation that is stored in bones.

Answer:
Science