Detailed Instructions: 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.
Problem:Two-dimensional applications of this technique include J-resolved, which accounts for J-coupling; and COSY, which relies on the application of two 90-degree pulses to a spin system. Its occurrence relies on the strength of the magnetic field, the frequency of absorption, and the gyromagnetic ratio of the proton in question. First observed in 1946 by Felix Bloch and Edward Purcell, this phenomenon is based on the precession of a proton as it is exposed to two magnetic fields, thereby indicating the presence of particular compounds in its namesake spectroscopy. FTP, identify this chemistry phenomenon that forms the basis for MRI.
Solution:
Science