physics

The First Self-Sustained Nuclear Chain Reaction

The First Self-Sustained Nuclear Chain Reaction

On December 2, 1942, during the Manhattan Project, a team led by Italian born physicist Enrico Fermi initiated the first self-sustaining nuclear chain reaction in the Chicago Pile-1 (CP-1), the world‘s first human-made nuclear reactor, and initiated the so-called atomic age. CP-1 was built on a rackets court, under the abandoned west stands of the original Alonzo Stagg Field stadium, at the University of Chicago. Nuclear Chain Reaction and the Atomic Bomb…
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Christian Doppler and the Doppler Effect

Christian Doppler and the Doppler Effect

On November 29, 1803, Christian Johann Doppler, Austrian Physicist and mathematician was born in Salzburg. Doppler is widely known for his principle, the Doppler effect, that the observed frequency of a wave depends on the relative speed of the source and the observer. He used this concept to explain the color of binary stars. “There have been applied sciences throughout the ages. … However this so-called practice was not much more than paper…
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Jocelyn Bell Burnell and the Discovery of Pulsars

Jocelyn Bell Burnell and the Discovery of Pulsars

On November 28, 1967, Jocelyn Bell Burnell and Anthony Hewish discovered the first Pulsar, a fast rotating neutron star that emits a beam of electromagnetic radiation. The radiation of a pulsar can only be observed when the beam of emission is pointing toward the Earth, much the way a lighthouse can only be seen when the light is pointed in the direction of an observer, and is responsible for the pulsed appearance…
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Sir Arthur Eddington – The Man who Proved Einstein’s General Relativity

Sir Arthur Eddington – The Man who Proved Einstein’s General Relativity

On November 22, 1944, British astrophysicist and philosopher Sir Arthur Stanley Eddington passed away. He became famous for his 1919 solar eclipse expedition to Principe, where he conducted astrophysical experiments to give proof for Albert Einstein‘s seminal theory of general relativity. “At terrestrial temperatures matter has complex properties which are likely to prove most difficult to unravel; but it is reasonable to hope that in the not too distant future we shall be…
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Hedy Lamarr – a Hollywood Star Invents Secure Communication Technology

Hedy Lamarr – a Hollywood Star Invents Secure Communication Technology

On November 9, 1913, Hollywood movie star Hedy Lamarr was born, co-inventor of an early form of the spread spectrum communication and frequency hopping, necessary for wireless communication from the pre-computer age to the present day. Family Background Ok, I assume that you are not necessarily familiar with spread spectrum communications technology. But, maybe you are wondering even more about a movie star diva of Hollywood’s Golden Age, who should be responsible for the…
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Edmond Halley and his famous Comet

Edmond Halley and his famous Comet

On November 8, 1656, Sir Edmond Halley was born. The astronomer, geophysicist, mathematician, meteorologist, and physicist, was best known for computing the orbit of the eponymous Halley’s Comet.[9] Background Edmond Halley was born in England to the family of a wealthy soap maker. Halley was able to receive a proper education. He is believed to have been interested in mathematics from early age. Halley first studied at St Paul’s School where he…
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Konrad Lorenz and the Study of Instinctive Behaviour of Animals

Konrad Lorenz and the Study of Instinctive Behaviour of Animals

On November 7, 1903, Austrian zoologist, ethologist, and ornithologist Konrad Lorenz was born. Lorenz is regarded as one of the main representatives of classical comparative behavioural research (ethology). He himself called this field of research “animal psychology” until 1949. “The competition between human beings destroys with cold and diabolic brutality…. Under the pressure of this competitive fury we have not only forgotten what is useful to humanity as a whole, but even…
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The Arecibo Radio Telescope – Looking for Extraterrestrial Signals

The Arecibo Radio Telescope – Looking for Extraterrestrial Signals

On November 1, 1963, the Arecibo radio telescope, by that time the earth‘s largest radio telescope, has been inaugurated in Arecibo, Puerto Rico. It is operated by the company SRI International under cooperative agreement with the National Science Foundation and is also called the National Astronomy and Ionosphere Center, although “NAIC” refers to both the observatory and the staff that operates it. Construction and Functionality The Arecibo telescope was built between the…
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Lise Meitner – The Misjudged Genius

Lise Meitner – The Misjudged Genius

On October 27, 1968, Austrian-Swedish physicist Lise Meitner passed away. She is known today for her passionate and extraordinary work on radioactivity and nuclear physics along with her colleague Otto Hahn,[1] who was honored with the Nobel Prize while Meitner stayed unrecognized. Family Background and Early Life Lise Meitner was born on November 7, 1878 in Vienna Leopoldstadt (2nd district of Vienna), Austria. She was the third daughter of the Jewish lawyer Philipp Meitner and…
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The Leyden Jar Introducing the Age of Electricity

The Leyden Jar Introducing the Age of Electricity

On October 11, 1745, German cleric Ewald Georg von Kleist and independently of him Dutch scientist Pieter van Musschenbroek from the city of Leiden, Netherlands, invented a predecessor of today’s battery, the Leyden Jar. The jar worked in principle like a capacitor for the storage of electrical energy and was used to conduct many early experiments in electricity. Its discovery was of fundamental importance in the study of electricity. In the times before its…
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