Monday, April 12, 2021
Saturday, April 10, 2021
Friday, April 9, 2021
PHYSICISTS OF THE DAY
Today we remember two great physicists #JohannSchweigger (for birthday) and #PyotrKapitsa (for death anniversary) --
Johann Salomo Christoph Schweigger invented the #galvanometer (1820), a device to measure the strength of an electric current. He developed the principle from #Oersted's experiment (1819) which showed that current in a wire will deflect a compass needle. He named this instrument a “galvanometer” in honour of #LuigiGalvani, the professor who gave #Volta the idea for the first battery.
Pyotr Leonidovich Kapitsa shared (with #ArnoPenzias and #RobertWoodrowWilson) the 1978 #NobelPrize for Physics for his basic strong magnetic field inventions and discoveries in the area of #low_temperature physics. He discovered that helium II (the stable form of liquid helium below 2.174 K, or -270.976°C) has almost no viscosity.
The same article you can read on Instagram here https://www.instagram.com/cosmological_astrophysics
Johann Salomo Christoph Schweigger invented the #galvanometer (1820), a device to measure the strength of an electric current. He developed the principle from #Oersted's experiment (1819) which showed that current in a wire will deflect a compass needle. He named this instrument a “galvanometer” in honour of #LuigiGalvani, the professor who gave #Volta the idea for the first battery.
Pyotr Leonidovich Kapitsa shared (with #ArnoPenzias and #RobertWoodrowWilson) the 1978 #NobelPrize for Physics for his basic strong magnetic field inventions and discoveries in the area of #low_temperature physics. He discovered that helium II (the stable form of liquid helium below 2.174 K, or -270.976°C) has almost no viscosity.
The same article you can read on Instagram here https://www.instagram.com/cosmological_astrophysics
Thursday, April 8, 2021
Tuesday, April 6, 2021
NOBEL LAUREATE NIELS BOHR
Niels Bohr’s groundbreaking paper proposing a new atomic model, 'On the constitution of atoms and molecules' is dated 5 April 1913.
The discoveries of the electron and radioactivity at the end of the 19th century led to different models for the structure of the atom. In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well-defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted. Bohr's theory could explain why atoms emitted light in fixed wavelengths.
He was awarded the Nobel Prize in Physics in 1922.
Learn more: https://www.nobelprize.org/prizes/physics/1922/bohr/facts
The discoveries of the electron and radioactivity at the end of the 19th century led to different models for the structure of the atom. In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well-defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted. Bohr's theory could explain why atoms emitted light in fixed wavelengths.
He was awarded the Nobel Prize in Physics in 1922.
Learn more: https://www.nobelprize.org/prizes/physics/1922/bohr/facts
Grateful thanks to
NOBELPRIZE.ORG
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