An electric light is a device that produces visible light from electric power. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and nighttime activities.
invented by Isaac Charles Johnson
Portland cement is the most common type of cement in general use around the…
invented by Carl Gassner
A zinc–carbon battery is a dry cell primary battery that provides direct…
invented by Lester Allan
The Pelton wheel or Pelton Turbine is an impulse-type water turbine invented by…
invented by James Blyth
A wind turbine is a device that converts the wind’s kinetic energy into…
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Inventions that changed the world
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