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In 1752 Ben Franklin propsed a notion of a postive and a negitive charge. This is when he did his famous kite experiment.
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Alessandro Volta invents an electric battery. This if the first source of dc energy.
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In 1849, James B. Francis improved the inward flow reaction turbine to over 90% efficiency.
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Thomas Alva Edison invented the lightbulb, now schools, houses, and factories can see at night.
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Heinrich Hertz discovers and measures waves and radio waves
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Conrad Hubert received a US patent in 1903, for a flashlight with an on/off switch.
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The world's first megawatt wind turbine is built and connected to the power grid in Castleton, Vermont. The turbine has 75-foot blades and weighs 240 tons.
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In shippingport, PA the first nuculear reactor is made for commercial use
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in 1954 the first sucessful silicon solar collectors ( solar pannels ) were peported by scientists.
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The first fuel cell bus is made by crhyslyer.
