physics

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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How High/Low Can You Go? – The Explorer Auguste Piccard

How High/Low Can You Go? – The Explorer Auguste Piccard

Scientists and explorers we are, to boldly go where no man has gone before. If there is one scientist, who might serve as the prototype of an bold explorer, then we have to consider Auguste Piccard, a Swiss professor of physics, who tried to explore the deepest depths of the sea as well as the extreme stratosphere of the earth. And he did this not only in theory, but by experiment (always…
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Thomas Young – The Last Man who Knew Everything

Thomas Young – The Last Man who Knew Everything

On June 13, 1773, British polymath and physician Thomas Young was born. Young made notable scientific contributions to the fields of vision, light, solid mechanics, energy, physiology, language, musical harmony, and Egyptology. He “made a number of original and insightful innovations” in the decipherment of Egyptian hieroglyphs (specifically the Rosetta Stone) before Jean-François Champollion eventually expanded on his work.[1] Young came from a family of Quakers, of Milverton, Somerset, UK, and was…
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Carl von Linde’s Breakthrough in the Refrigeration Process

Carl von Linde’s Breakthrough in the Refrigeration Process

On June 11, 1842, German scientist, engineer, and businessman Carl von Linde was born. Von Linde discovered a refrigeration cycle and invented the first industrial-scale air separation and gas liquefaction processes. These breakthroughs laid the backbone for his 1913 Nobel Prize in Physics. Born in Berndorf, Germany as the son of a German-born minister and Swedish mother, Carl von Linde was expected to follow in his father’s footsteps, but took another direction entirely. In 1854…
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Daniel Gabriel Fahrenheit and the Measurement of Temperature

Daniel Gabriel Fahrenheit and the Measurement of Temperature

On May 24, 1686, Dutch-German-Polish physicist, engineer, and glass blower Daniel Gabriel Fahrenheit was born. He is is best known for his invention of the mercury-in-glass thermometer in 1714, and for developing a temperature scale that is now named after him. His parents living in Gdansk were Daniel (1656-1701) and Concordia Fahrenheit (1657-1701) (née Schumann, related Runge). The mother came from a well-known Gdañsk merchant family and was the daughter of the…
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Joseph-Louis Lagrange and the Celestial Mechanics

Joseph-Louis Lagrange and the Celestial Mechanics

On April 10, 1813, Italian mathematician and astronomer Joseph-Louis Lagrange passed away. Lagrange made significant contributions to the fields of analysis, number theory, and both classical and celestial mechanics. Lagrange was born on January 25, 1736 as Giuseppe Ludovico Lagrangia in Turin, previously capital of the duchy of Savoy, but became the capital of the kingdom of Sardinia in 1720. His father was Giuseppe Francesco Lodovico Lagrangia, Treasurer of the Office of…
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Josef Stefan’s Work in Thermodynamics

Josef Stefan’s Work in Thermodynamics

On March 24, 1835, Carinthian Slovene physicist, mathematician, and poet Josef Stefan was born. Stefan is best known for originating Stefan’s law in 1879, a physical power law stating that the total radiation from a black body is proportional to the fourth power of its thermodynamic temperature T. As long as you are not a physicist specialized in black body radiation, you probably have never heard of Josef Stefan. For me as a computer…
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Augustin-Jean Fresnel and the Wave Theory of Light

Augustin-Jean Fresnel and the Wave Theory of Light

On March 10, 1788, French civil engineer and physicist Augustin-Jean Fresnel was born. Augustin-Jean Fresnel‘s research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton‘s corpuscular theory, from the late 1830s until the end of the 19th century. Augustin-Jean Fresnel attended the École Nationale des Ponts et Chaussées (National School of Bridges and Roads). He graduated in 1809  and entered the service of…
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Hans Christian Ørsted connecting Electricity and Magnetism

Hans Christian Ørsted connecting Electricity and Magnetism

On March 9, 1851, Danish physicist Hans Christian Ørsted passed away. Hans Christian Ørsted discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. He is still known today for Oersted‘s Law and the oersted (Oe), the cgs unit of magnetic H-field strength, is named after him. Hans Christian Ørsted was born in Rudkøbing, Denmark, the elder son of an apothecary, Søren Christian Ørsted, and…
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Otto Hahn – the Father of Nuclear Chemistry

Otto Hahn – the Father of Nuclear Chemistry

On March 8, 1879, German chemist and pioneer in the fields of radioactivity and radiochemistry Otto Hahn was born. He was awarded the Nobel Prize in Chemistry in 1944 for the discovery and the radiochemical proof of nuclear fission at the exclusion of his colleague Lise Meitner. He is referred to as the father of nuclear chemistry. Otto Hahn studied chemistry and mineralogy at the University of Marburg. During his third and fourth semester,…
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