Scientific Inventions and Discoveries

Following is the list of Important Scientific Inventions and their Inventors.

**TIMELINE / SCIENTIFIC INVENTIONS AND INVENTORS**
Year	Scientific Invention	Inventor
60	A small turbine driven by jets of stream	Hero
1644	Mercury barometer	Torricelli
1714	Mercury Thermometer	Fahrenheit
1800	Battery	Volta
1821	Electric motor	Faraday
1832	Moving coil-meter	Sturgeon
1879	Electric Light Bulbs	Swan and Edison
1928	Radiation Detector	Geiger and Muller
1942	Nuclear Reactor	Fermi
1947	Transistor	Bardeen, Brattain and Shockley
1960	Laser	Maiman
	Aeroplane	Wright Brothers
	Barometer	Jorricilli
	Galvanometer	Sweigger
	Glass	Egypt & Mosopotamia
	Maps	Evatosthens
	Motor A.c	Tesla
	Motor D.c	Davenport
	Refrigerator	Harrison
	Sub Marine	Holland
	Television	J. Baird
	Tractor	Froelich
	Radio	Marconi
	Telephone	Graham Bell
	Steam Boat	Fulton
	Steam Engine	Savery
	Telescope	Lippershey
	Transformer	William Stanley
	Radar	Watson Watt
	Sewing Machine	Home
	Washing Machine	Hurdy Machine
1958	Integrated Circuit	St Clair Kilby

SCIENTIFIC DISCOVERIES AND THEIR DISCOVERERS
Following is the list of Important Scientific discoveries and their discoverers.

**TIMELINE / SCIENTIFIC DISCOVERIES AND DISCOVERERS**
Year	Scientific Discovery	Discoverer
1790	Shape of our galaxy	Herschel
1895	X-Rays	Rontgen
1896	Radioactivity	Bacquerel
1897	Electron	Thomson
1898	Radium and Polonium	M. Curie
1899	Alpha and Beta rays	Rutherford
1919	Proton	Rutherford
1929	Universe is expanding	Hubble
1932	Neutron	Chadwick
1938	Nuclear Fission	Hahn

KEY DEVELOPMENTS IN SCIENCE

240 BC – Eratosthenes estimates the diameter of the Earth by comparing shadow angles in different places
1543 – Copernicus suggests that the Sun is at the center of the Universe, with the Earth and planets moving around it
1600 – Gilbert suggests that the Earth acts like a giant bar magnet
1604 – Galileo shows that all falling objects should have the same, steady acceleration
1621 – Snell states his law of refraction
1654 – Guericke demonstrates atmospheric pressure
1662 – Boyle states his law of gases
1678 – Huyghens puts forward his wave theory of light
1679 – Hooke states his law for elastic materials
1687 – Newton publishes his theory of gravity and laws of motion
1752 – Franklin performs a hazardous experiment with a kite to show that lightning is electricity
1803 – Dalton suggests that matter is made up of atoms
1803 – Young demonstrates the wave nature of light
1825 – Ampere works out a law for the force between current-carrying conductors
1827 – Ohm states his law for metal conductors
1832 – Faraday demonstrates electromagnetic induction
1849 – Fizeau measures the speed of light
1852 – Kelvin states the law of conservation of energy
1864 – Maxwell predicts the existence of radio waves and other electromagnetic waves
1877 – Cailletet liquefies oxygen
1888 – Hertz demonstrates the existence of radio waves
1894 – Marconi transmits the first radio signals
1900 – Plank proposes the Quantum theory
1905 – Einstein uses the quantum theory to explain the photoelectric effect, and publishes his special theory of relativity
1911 – Rutherford proposes a nuclear model of the atom
1913 – Bohr uses the quantum theory to modify Rutherford’s model of the atom
1916 – Einstein publishes his general theory of relativity
1924 – De Broglie suggests that particles can behave as waves
1925 – Schrodinger developed a wave-machine model of the atom
1927 – Lemaitre suggests the possibility of the Big Bang
1929 – Hubble discovers that the Universe is expanding
1932 – Cockroft and Walton produce the first nuclear change using a particle accelerator
1957 – First artificial satellite, Sputnik I, put into orbit
1963 – First geostationary communications satellite
1969 – First manned landing on the Moon
1971 – Intel Corporation makes the first microprocessor
1977 – First experimental evidence of quarks
1990 – Hubble Space Telescope launched