Ottaviano-Fabrizio Mossotti (18 April 1791 – 20 March 1863) was an Italian

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate caus ...

who was exiled from Italy for his

liberal Liberal or liberalism may refer to: Politics * a supporter of liberalism ** Liberalism by country * an adherent of a Liberal Party * Liberalism (international relations) * Sexually liberal feminism * Social liberalism Arts, entertainment and m ...

ideas. During the

First Italian War of Independence The First Italian War of Independence ( it, Prima guerra d'indipendenza italiana), part of the Italian Unification (''Risorgimento''), was fought by the Kingdom of Sardinia (Piedmont) and Italian volunteers against the Austrian Empire and other ...

he led a "battalion of students," part of a delegation from the

Grand Duchy of Tuscany The Grand Duchy of Tuscany ( it, Granducato di Toscana; la, Magnus Ducatus Etruriae) was an Italian monarchy that existed, with interruptions, from 1569 to 1859, replacing the Republic of Florence. The grand duchy's capital was Florence. In th ...

. He later taught

astronomy Astronomy () is a natural science that studies astronomical object, celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and chronology of the Universe, evolution. Objects of interest ...

and

physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ...

at the

University of Buenos Aires The University of Buenos Aires ( es, Universidad de Buenos Aires, UBA) is a public university, public research university in Buenos Aires, Argentina. Established in 1821, it is the premier institution of higher learning in the country and one o ...

. His name is associated with a type of multiple-element

lens A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements''), ...

for correcting

spherical aberration In optics, spherical aberration (SA) is a type of optical aberration, aberration found in optical systems that have elements with spherical surfaces. Lens (optics), Lenses and curved mirrors are prime examples, because this shape is easier to man ...

and

coma A coma is a deep state of prolonged unconsciousness in which a person cannot be awakened, fails to respond normally to painful stimuli, light, or sound, lacks a normal wake-sleep cycle and does not initiate voluntary actions. Coma patients exhi ...

, but not

chromatic aberration In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the lens elements varies with the wave ...

. His studies on dielectrics led to important results: the Clausius-Mossotti formula is partly named after him, and his views on dielectric behavior helped lead

James Clerk Maxwell James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish mathematician and scientist responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and ligh ...

to devise his theory of the

displacement current In electromagnetism, displacement current density is the quantity appearing in Maxwell's equations that is defined in terms of the rate of change of , the electric displacement field. Displacement current density has the same units as electric ...

, which led in turn to the theoretical prediction of

electromagnetic waves In physics, electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) lig ...

. Mossotti was chair of experimental physics in Buenos Aires (1827–1835) and taught numerous Argentinian physicians his views on

dielectric In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field. When a dielectric material is placed in an electric field, electric charges do not flow through the mate ...

s, thereby becoming influential on the Argentine-German

neurobiological Neuroscience is the scientific study of the nervous system (the brain, spinal cord, and peripheral nervous system), its functions and disorders. It is a multidisciplinary science that combines physiology, anatomy, molecular biology, developme ...

tradition regarding electricity inside brain tissue. Later (after 1906) these views influenced this tradition's models of stationary waves in the

interference Interference is the act of interfering, invading, or poaching. Interference may also refer to: Communications * Interference (communication), anything which alters, modifies, or disrupts a message * Adjacent-channel interference, caused by extr ...

of neural activity for short-term memory. Mossotti later returned to Italy and participated in military actions while in his sixties, and was appointed as senator. In Italy Mossotti taught more than five hundred mathematical students. His work also influenced

Hendrik Antoon Lorentz Hendrik Antoon Lorentz (; 18 July 1853 – 4 February 1928) was a Dutch physicist who shared the 1902 Nobel Prize in Physics with Pieter Zeeman for the discovery and theoretical explanation of the Zeeman effect. He also derived the Lorentz t ...

's views on

fundamental forces In physics, the fundamental interactions, also known as fundamental forces, are the interactions that do not appear to be reducible to more basic interactions. There are four fundamental interactions known to exist: the gravitational and electrom ...

Works

* * * *

Notes

External links

*
BiographyThe Pavers of Maxwell's Pathway to His Equations: Ottaviano Fabrizio Mossotti
PDF includes a long Mossotti Bibliography list. 1791 births 1863 deaths 19th-century Italian physicists People from Novara University of Buenos Aires faculty {{Italy-physicist-stub