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:
Gravitational redshift was measured by Pound, Rebka, and Snider in Harvard's Jefferson Tower using this technique to detect a frequency shift of order one part in ten to the 14th. It can be used for precise studies of the Zeeman effect in nuclei. Iron 57 and tin 119 are two of the isotopes used in this type of spectroscopy due to narrow linewidths in their transitions. Before this technique, the large size of Doppler shifts relative to transition widths made nuclear spectroscopy problematic. It was discovered by its namesake when he was a graduate student at the Munich University of Technology. FTP, what is this effect in which a crystal lattice reduces recoil energy
answer:
Science


question:
Instead of employing the Debye-Hull-Scherrer powder method, its namesakes relied on an array of atomic planes. Its namesakes built a vacuum apparatus and employed a hot filament, an accelerating electrode, and an arc-mounted Faraday box. A leak in the vacuum led its namesakes to heat the target, resulting in crystallized nickel, which gave startling results. A plot of collector current against beam energy was explained by constructive interference, and the results in general could be derived by combining Bragg's equation with the de Broglie wavelength for electrons. FTP name this experiment named for two physicists, which proved that electrons diffract.
answer:
Science


question:
Protrusions of this substance in the spine are called Schmorl's nodes, and Tietze syndrome occurs when this is inflammed. Its fibro type can be found in symphyses, while the pinna is composed of its elastic type. The hyaline type of this substance is covered by the perichondrium. (*)  Intervertebral discs are made of this substance, which heals slowly due to its lack of blood vessels. Chondrocytes are cells found in this substance, and during endochondral ossification, it is replaced with bone. Patients with osteoarthritis have a loss of this substance, which normally helps lubricate joints. For ten points, name this connective tissue which makes up the human nose and ear.
answer:

Science