History of Electricity Timeline

Samuel Morse transmitted the message 'What hath God wrought' from Washington, D.C. to Baltimore over an experimental telegraph line. The telegraph revolutionized long-distance communication and created the first practical use of electricity for information transfer.

Image source: Samuel Morse

After earlier failed attempts, the ship Great Eastern successfully laid a durable telegraph cable across the Atlantic Ocean, enabling nearly instantaneous communication between Europe and North America for the first time.

Image source: Transatlantic telegraph cable

Thomas Edison demonstrated a long-lasting incandescent lamp using a carbon filament, creating the first commercially practical electric light bulb. Edison's Menlo Park laboratory also developed complete lighting systems to bring electric light into homes and businesses.

Image source: Incandescent light bulb

A fierce commercial rivalry pitted Thomas Edison's direct current systems against George Westinghouse's alternating current systems. AC ultimately prevailed because transformers made it easy to transmit power efficiently over long distances, shaping modern power grids.

Image source: War of the currents

Thomas Edison's Pearl Street Station in Manhattan began supplying direct current (DC) electricity to customers in lower New York City. It was the world's first central power station, serving about 59 customers and illuminating Wall Street.

Image source: Pearl Street Station

Nikola Tesla patented the alternating current (AC) induction motor, a simple, rugged design without brushes or commutators. Licensed by George Westinghouse, it became essential to the adoption of AC power systems worldwide.

Image source: Induction motor

George Westinghouse, using Tesla's AC system, illuminated the Chicago World's Fair with nearly 100,000 lamps. The dazzling display publicly demonstrated the safety and superiority of alternating current to millions of visitors.

Image source: World's Columbian Exposition

The Edward Dean Adams Power Plant at Niagara Falls began transmitting AC electricity 26 miles to Buffalo, New York. It was the first large-scale hydroelectric power plant and proved that distant cities could be powered from remote energy sources.

Image source: Adams Power Plant Transformer House

President Franklin D. Roosevelt established the Rural Electrification Administration to bring electricity to American farms, where fewer than 11 percent had power. Within two decades, rural electrification rates rose above 90 percent, transforming agricultural life.

Image source: Rural Utilities Service

The Soviet Union's Obninsk Nuclear Power Plant became the first nuclear reactor connected to an electrical grid, delivering about 5 megawatts of power. It inaugurated the atomic age of electricity generation.

Image source: Obninsk Nuclear Power Plant

J.J. Thomson identified cathode rays as streams of tiny negatively charged particles, later named electrons. His discovery revealed the fundamental carrier of electricity and opened the era of subatomic physics.

Image source: J. J. Thomson

Guglielmo Marconi received a radio signal sent from Cornwall, England at St. John's, Newfoundland, demonstrating wireless telegraphy across the Atlantic. Radio soon transformed global communication, navigation, and entertainment.

Image source: Guglielmo Marconi

Robert Millikan's oil drop experiment precisely measured the elementary electric charge of the electron. The result confirmed the quantized nature of electric charge and earned Millikan the Nobel Prize in Physics in 1923.

Image source: Oil drop experiment

At Bell Labs, John Bardeen, Walter Brattain, and William Shockley demonstrated the point-contact transistor, the first solid-state amplifier. Transistors replaced bulky vacuum tubes, enabling miniaturized electronics, computers, and the digital age.

Jack Kilby at Texas Instruments and Robert Noyce at Fairchild Semiconductor independently invented the integrated circuit, placing multiple transistors on a single chip of semiconductor material. Microchips became the foundation of modern computing and electronics.

Image source: Integrated circuit

NASA's Apollo missions relied on photovoltaic solar panels to power spacecraft and satellites, demonstrating the reliability of solar electricity beyond Earth. Solar technology, first developed at Bell Labs in 1954, entered mainstream use through the space program.

Image source: Solar cell

Intel released the 4004, the first commercially available microprocessor, packing a complete CPU onto a single chip. This breakthrough enabled personal computers and launched the exponential growth described by Moore's law.

Image source: Intel 4004

Georg Bednorz and K. Alex Müller discovered superconductivity in ceramic materials at temperatures far higher than previously achieved, followed by YBCO compounds superconducting above liquid nitrogen temperature. These discoveries raised hopes for lossless power transmission and powerful magnets.

Image source: High-temperature superconductivity

Wind power expanded rapidly in the 1990s, with large wind farms such as Denmark's Vindeby offshore project and California's Altamont Pass feeding significant electricity into national grids. Wind became one of the fastest-growing sources of renewable electricity.

Image source: Wind farm

Sony released the first commercial lithium-ion battery, based on research by John Goodenough, Akira Yoshino, and others. Lightweight and rechargeable, lithium-ion batteries enabled portable electronics, laptops, smartphones, and eventually electric vehicles.

Image source: Lithium-ion battery

Tesla Motors began deliveries of the Roadster, the first highway-legal production electric car powered by lithium-ion batteries with over 200 miles of range. Its success spurred automakers worldwide to invest heavily in electric vehicles.

Image source: Tesla Roadster (first generation)