lsis a102-electromagnetism reesearch presentation

8/6/2019 LSIS A102-Electromagnetism Reesearch Presentation

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ELECTROMAGNETISM:

A BRIEF

HISTORY, ANDITS USES


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A REPORT BY PETER

GUNDUNAS

To briefly explore the, elemental

understanding, history and uses of

the fundamental force ofelectromagnetism


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ELECTROMAGNETI

SM: Historic highlights about

understanding this force of nature

Some present uses

Some future possibilities


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Then God said, Let there be

light; and there was light.

What exactly isElectromagnetism?


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ELECTROMAGNETI

SM: UNDERSTANDING AND HISTORY Of the four known forces in nature, the

electromagnetic force is all-pervading.

Being effective at subatomic distances and at

astronomical distances. A proper study of electromagnetism is central to

physics.

The first experimenters were studying magneticand static phenomenon.

The Ancient Greeks and Chinese beginexperiments with static electricity and magneticloadstones

In 1600 William Gilbert (1544-1603), an Englishphysician, launches [the] science of magnetismwith his book De Magnete. Gilbert makes the firstclear distinction between magnetic and the ambereffect (static electricity, as we call it).


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ELECTROMAGNETI

SM: UNDERSTANDING AND HISTORY The early 1800s usher in the beginnings of

the modern understanding of electromagnetictheories.

In 1820, Andre Marie Ampere modelsmagnets in terms of molecular electriccurrents. His formulation inaugurates thestudy of electrodynamics independent ofelectrostatics.

1831, Michael Faraday (1791-1867) invents the

electrical transformer, discoveringelectromagnetic induction; invents thedynamo and introduces lines of force.


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ELECTROMAGNETI

SM: UNDERSTANDING AND HISTORY 1855, James Clerk Maxwell (1831-

1879) establishes, among many

things, the connection between thespeed of propagation of an

electromagnetic wave and the speed

of light, and establishing the

theoretical understanding of light.

1887, Hendrick A. Lorentz (1853-1928)formulates the equations for charged

particles in motion.


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ELECTROMAGNETI

SM: UNDERSTANDING AND HISTORY In the beguinning of The 20th Century,

Albert Einstein (1879-1955) analyzesthe phenomena of the photoelectric

effect and theorizes that light may betaken to be made up of vast amountsof packets of electromagneticradiation in discrete units.

1907, shortly before his death,Hermann Minkowski (1864-1909),reinterprets Einsteins relativitytheory as a kind of geometry ofspacetime, considered as a singlemedium.


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ELECTROMAGNETI

SM: UNDERSTANDING AND HISTORY Einstein and Minkowskis

theories open up new avenues

for research and discovery.


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ELECTROMAGNETI

SM:EARLY EXPERIMENTERS Practical applications of

electromagnetic devices becomes

easier when in 1800, AlessandroVolta (1747-1827), creates the

electric battery or pile.


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ELECTROMAGNETI

SM:EARLY EXPERIMENTERS In the early 1830s, Joseph Henry

(1797-1878), an American, is a founding

father of the Electric Age. Among hismany discoveries and inventions were

mutual induction, self-induction,

improved and sophisticated

electromagnets, the electric relay, the

concept of the electric transformer, andthe electric motor--which runs everything

from trains to vacuum cleaners and

toothbrushes.


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ELECTROMAGNETI

SM:EARLY EXPERIMENTERS Henrys work in

electromagnetic induction was the

scientific foundation for thedevelopment of the telegraph and

telephone, and thus the launching

pad for the 19th-century

communications revolution thatforever changed human society.


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ELECTROMAGNETI

SM:SPECIAL USES Special applications of

electromagnetism are most evident

in medicine. Devices such as theX-ray and Magnetic ResonanceImaging, allow Doctors to diagnosepatients non-invasively.

Magnetometers and Radar (radiodetecting and ranging), can revealsurface and sub-surface details ofgeological terrain


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ELECTROMAGNETI

SM:FUTURE POSSIBILITIES Analysis of electromagnetic signals

at very low frequencies (VLFs)

may help predict earthquakes Utilizing the electrical power of

Earths magnetic field

Anti-gravity devices that would

switch off the inertia of objects.


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ELECTROMAGNETI

SM:CONCLUSION Electromagnetism is one of the four

fundamental forces of The Universe andthe one in which the common man has

the most ability to utilize through thesenses of sound and light.

The following was meant to be morethan just a simple history andexplanation of why the switch turns onthe light, or the radio plays music, orexactly how the grocery list is held on therefrigerator. Keeping it brief has been thechallenge.


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ELECTROMAGNETI

SM:JUST SOMETHING TO |THINK ABOUT} Maybe there is no such thing as

mass-- only charge, which gives

the illusion of mass when it isimmersed in a quantum vacuum


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REFERENCES:

Albert Van Helden, William Gilbert,March 15, 2004, 8:17 PM

Bernhard M. Haisch, Alfonso Rueda, A Quantum Broom Sweeps Clean, Mercury San Francisco,Mrch 7, 2004, 1:10 AM

DrHeidi Reinholz, Electromagnetism, Research Fellow School ofPhysics / Academic Staff (Physics),March 9,

2004, 5:22 PM Energy Information Administration, What is Electricity, 1000 Independence Avenue, SW Washington,

DC 20585< http://www.eia.doe.gov/kids/electricity.html>March 9, 2004, 7:45 PM

E. R. Mognaschi,, ON THE POSSIBLE ORIGIN, PROPAGATION AND DETECTABILITY OFELECTROMAGNETIC PRECURSORS OF EARTHQUAKES,

Google search, HAARP

March 16, 2004, 9:24 PM Google search, Health and magnets: March 16, 2004, 9:40 PM


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REFERENCES:

J J O'Connor and E F Robertson, James Clerk Maxwell,March 15, 2004, 9:28 PM

Jack Meadows, The Great Scientists: The Story of Service Told Through the Lives of TwelveLandmark Figures, Oxford University Press, New York: 2000.

Jeff Biggus, Sketches of a History of Classical Electromagnetism (Optics, Magnetism,Electricity, Electromagnetism) last updated Monday, 14-Jan-2002 00:20:15 CST, 1996

- 2004, WE/03/10/04

P. Weiss, Coming soon: Knavish electromagnetic acts. Science News. March 25, 2000 March 7, 2004, 1:25 AM

PatrickHughes, Keepers of the Flame, Weatherwise, Oct/Nov, 1997.

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