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Ancient Egyptian texts described electric fish and identified them with thunder
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Thales of Miletus described static electricity by rubbing fur on substances such as amber.
Static electricity is an imbalance of electric charges within or on the surface of a material. -
English scientist William Gilbert coined the word electricus after careful experiments.
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Italian physicist Alessandro Volta invented the battery
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Atomic theory by John Dalton proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.
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Danish physicist Hans Christian Ørsted accidentally discovered that an electric field creates a magnetic field.
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English physicist William Sturgeon developed the first electromagnet
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German physicist Georg Ohm introduced the concept of electrical resistance.
The electrical resistance of an object is a measure of its opposition to the flow of electric current. -
German scientist Johann Philipp Reis invented Microphone
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Russian engineer Pavel Yablochkov invented electric carbon arc lamp.
An arc lamp or arc light is a lamp that produces light by an electric arc (also called a voltaic arc). -
German industrialist Werner von Siemens developed primitive loudspeaker
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English engineer Joseph Swan invented Incandescent light bulb.
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated until it glows. -
American physicist Edwin Herbert Hall discovered Hall Effect.
The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current. -
German physicist Heinrich Hertz proves the existence of electromagnetic waves, including what would come to be called radio waves.
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German engineer Konrad Zuse developed the first programmable computer in Berlin.
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Scottish Engineer John Logie Baird developed the first color picture tube.
Color television is a television transmission technology that includes information on the color of the picture, so the video image can be displayed in color on the television set. -
American engineer Theodore Harold Maiman developed a LASER.
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. -
Nick Holonyak Jr. invented the LED.
A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. -
An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.
