The photovoltaic effect is the generation of voltage and electric current in a material upon exposure to light. It is a physical and chemical phenomenon.
invented by Nicolaus August Otto
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in…
invented by Ascanio Sobrero
Nitroglycerin (NG), also known as trinitroglycerin (TNG), nitro, glyceryl…
invented by Edwin Budding
A lawn mower (also known as a mower, grass cutter or lawnmower) is a machine…
invented by Paul Vieille
Poudre B was the first practical smokeless gunpowder created in 1884. It was…
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Inventions that changed the world
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