Science Experiments for Kids

 Raymond Kurzweil, (1948–) Optical character recognition; flatbed scanner

 Stephanie Kwolek, (1923–)

 John Howard Kyan (1774–1850) Ireland – The process of Kyanization used for wood

preservation

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 Dmitry Lachinov, (1842–1902) Russia – mercury pump, economizer for electricity

consumption, electrical insulation tester, optical dynamometer, photometer, elecrolyser

 René Laënnec, (1781–1826)

 Lala Balhumal Lahuri, (c. 1842) Mughal India – seamless globe and celestial globe

 Georges Lakhovsky, (1869–1942) Russia/U.S. – Multiple Wave Oscillator

 Hedy Lamarr, (1913–2000) Austria and U.S. – Spread spectrum radio

 Edwin H. Land, ( 1909 – 1991) U.S. – Polaroid polarizing filters and the Land Camera

 Samuel P. Langley, (1834–1906)

 Irving Langmuir, (1851–1957) U.S. – gas filled incandescent light bulb, hydrogen welding

 Lewis Latimer, (1848–1928) – Invented the modern day light bulb

 Gustav de Laval, (1845–1913) Sweden – invented the milk separator and the milking

machine

 Semyon Lavochkin, (1900– 1960 ) Russia – La-series aircraft, first operational surface-to-

air missile S- 2 5 Berkut

 John Bennet Lawes, (1814–1900) England – superphosphate or chemical fertilizer

 Nikolai Lebedenko Russia – Tsar Tank, the largest armored vehicle in history

 Sergei Lebedev, (1874–1934) Russia – commercially viable synthetic rubber

 Antoni van Leeuwenhoek, (1632–1723) Netherlands – development of the microscope

 Jean-Joseph Etienne Lenoir, (1822–1900)

motorboat

 R. G. LeTourneau, (1888–1969) U.S.- electric wheel, motor scraper, mobile oil drilling

platform, bulldozer, cable control unit for scrapers

 Willard Frank Libby, (1908–1980)

 Justus von Liebig, (1803–1873)

 Otto Lilienthal, (1848–1896)

 Frans Wilhelm Lindqvist, (1862–1931) Sweden – Kerosene stove operated by

compressed air

 Hans Lippershey, (1570–1619)

 Lisitsyn brothers, Ivan Fyodorovich and Nazar Fyodorovich

documented makers)

 William Howard Livens, (1889–1964) England – chemical warfare – Livens Projector.

 Alexander Lodygin, (1847–1923) Russia – electrical filament, incandescent light bulb with

tungsten filament

 Mikhail Lomonosov, (1711–1765) Russia – night vision telescope, off-axis reflecting

telescope, coaxial rotor, re-invented smalt