NationMaster - Encyclopedia: Chladni's figures

Ernst Florenz Friedrich Chladni (November 30, 1756 - April 3, 1827) was a German physicist. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... November 30 is the 334th day (335th on leap years) of the year in the Gregorian calendar. ... 1756 was a leap year starting on Thursday (see link for calendar). ... April 3 is the 93rd day of the year (94th in leap years) in the Gregorian calendar, with 272 days remaining. ... 1827 was a common year starting on Monday (see link for calendar). ... Physics (from the Greek, φυσικός (phusikos), natural, and φύσις (phusis), nature) is the science of nature in the broadest sense. ...

Chladni was born in Wittenberg. His work on vibrating plates and the calculation of the speed of sound for different gases made him the founder of acoustics. The patterns formed by a thin layer of sand on a vibrating plate are called "Chladni patterns". Wittenberg, officially Lutherstadt Wittenberg, is a town in Germany, in the Bundesland Saxony-Anhalt, at 12°59 east, 51°51 north. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... The speed of sound varies depending on the medium through which the sound waves pass. ... Acoustics is a branch of physics and is the study of sound, mechanical waves in gases, liquids, and solids. ... Patterns in the sand Sand is an example of a class of materials called granular matter. ...

He invented a musical instrument called Chladni's euphonium, consisting of glass rods of different pitches, which should not be confused with a brass euphonium. He also discovered Chladni's law. A typical 4-valved bell-upright euphonium The euphonium is a valved brass instrument, the tenor member of the tuba family. ...

In 1794, Chladni published, in German, Über den Ursprung der von Pallas gefundenen und anderer ihr ähnlicher Eisenmassen und über einige damit in Verbindung stehende Naturerscheinungen, (On the Origin of the Pallas Iron and Others Similar to it, and on Some Associated Natural Phenomena), in which he proposed that meteorites have their origins in outer space. This was a very controversial statement at the time, and with this book Chladni also became one of the founders of modern meteorite research. Peter Simon Pallas (September 22, 1741 - September 8, 1811) was a German-born Russian zoologist. ... Worlds second largest Meteorite in Culiacan, Mexico A meteorite is a relatively small extra-terrestrial body that reaches the Earths surface. ...

Further Reading