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2750 BCE
Ancient Egyptians
Ancient Egyptian texts described electric fish and identified them with thunder -
600 BCE
Static Electricity
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. -
The word "electricus"
English scientist William Gilbert coined the word electricus after careful experiments. -
The battery
Italian physicist Alessandro Volta invented the battery -
Atomic theory
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. -
Magnetic field
Danish physicist Hans Christian Ørsted accidentally discovered that an electric field creates a magnetic field. -
Electromagnet
English physicist William Sturgeon developed the first electromagnet -
Electrical resistance
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. -
Microphone
German scientist Johann Philipp Reis invented Microphone -
Arc lamp
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). -
Loudspeaker
German industrialist Werner von Siemens developed primitive loudspeaker -
Incandescent light bulb
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. -
Hall Effect
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. -
Electromagnetic waves
German physicist Heinrich Hertz proves the existence of electromagnetic waves, including what would come to be called radio waves. -
Programmable computer
German engineer Konrad Zuse developed the first programmable computer in Berlin. -
Color picture tube
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. -
Laser
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. -
LED
Nick Holonyak Jr. invented the LED.
A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. -
Electronic calculator
An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.
