Which musical instrument invented by the physicist Torricelli gets its name from a tradition identifying the angel who blows the horn to announce Judgment Day in Christinity?
Gabriel's Horn Gabriel's Horn Gabriel's horn (also called Torricelli's trumpet) is a geometric figure which has infinite surface area but finite volume. The name refers to the biblical tradition identifying the Archangel Gabriel as the angel who blows the horn to announce Judgment Day, associating the divine, or infinite, with the finite. The properties of this figure were first studied by Italian physicist and mathematician Evangelista Torricelli in the 17th century. Gabriel's horn is formed by taking the graph of with the domain (thus avoiding the asymptote at ) and rotating it in three dimensions about the -axis. The discovery was made
Horn (instrument) Horn (instrument) A horn is any of a family of musical instruments made of a tube, usually made of metal and often curved in various ways, with one narrow end into which the musician blows, and a wide end from which sound emerges. In horns, unlike some other brass instruments such as the trumpet, the bore gradually increases in width through most of its length—that is to say, it is conical rather than cylindrical. In jazz and popular-music contexts, the word may be used loosely to refer to any wind instrument, and a section of brass or woodwind instruments, or