Electromagnetism Topics

• lorentz force law
• classical electromagnetism
• quantum electrodynamics
• gian domenico
• theory of electromagnetism
• quantum mechanics
• legal scholar
• quantum theory
• magnetic needle
• galvanic current
• electrostatic charges
• mathematical foundation
• electromagnetic force
• electromagnetic field
• progenitors
• qed
• planck
• 1940s
• invention
• maxwell

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Electromagnetism, Electromagnetism

In 1802 Gian Domenico Romagnosi, an Italian legal scholar, deflected a magnetic needle by electrostatic charges. Actually, no galvanic current existed in the setup and hence no electromagnetism was present. An account of the discovery was published in 1802 in an Italian newspaper, but it was largely overlooked by the contemporary scientific community.

However, the effect did not become widely known until 1820, when rsted performed a similar experiment. rsted's work influenced Ampre to produce a theory of electromagnetism that set the subject on a mathematical foundation.

In classical electromagnetism, the electromagnetic field obeys a set of equations known as Maxwell's equations, and the electromagnetic force is given by the Lorentz force law.

Planck's and Einstein's theories were progenitors of quantum mechanics, which, when formulated in 1925, necessitated the invention of a quantum theory of electromagnetism. This theory, completed in the 1940s, is known as quantum electrodynamics (or "QED"), and is one of the most accurate theories known to physics.

Source: Wikipedia > Electromagnetism