Christiaan Huygens

Ole Rømer and the Speed of Light

Ole Rømer and the Speed of Light

On October 5, 1644 (or according to the old julian calendar September 25), Danish astronomer Ole Christensen Rømer was born. He became known by the first proof published in 1676 that the speed of light is finite and not infinite, respectively by the guidance, how the speed of light can be calculated by observation of the Jupiter moons. Ole Rømer – Early Years Ole Rømer was born in Århus, Denmark, to merchant and skipper…
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Christiaan Huygens and the Discovery of Saturn Moon Titan

Christiaan Huygens and the Discovery of Saturn Moon Titan

On March 25, 1655, Saturn‘s largest moon Titan was discovered by astronomer and physicist Christiaan Huygens. Titan is considered as the most Earth-like moon discovered so far and the second largest in the solar system. Christian Huygens’ Background Christiaan Huygens was born into an influential family and provided with a decent education all his life, leaning several foreign languages mathematics, logic, and rethoric. His father was friends with Galileo Galilei and René…
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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. “It’s not observation but theory that led me to this result that experience has confirmed afterwards.” – Augustin-Jean Fresnel, explaining how he was led to…
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Christiaan Huygens and the Pocket Watch

Christiaan Huygens and the Pocket Watch

On October 4, 1675, prominent Dutch mathematician and scientist Christiaan Huygens patented a pocket watch. Huygens was a leading scientist of his time, who established the wave theory of light and made outstanding astronomical discoveries. He also patented the first pendulum clock in 1656, which he has developed to meet his need for exact time measurement while observing the heavens. Youth and Education Christiaan Huygens was born on 14 April 1629 in…
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Denis Papin and the Pressure Cooker

Denis Papin and the Pressure Cooker

On August 22, 1647, French physicist, mathematician and inventor Denis Papin was born. He is best known for his pioneering invention of the steam digester, the forerunner of the steam engine, and of the pressure cooker. He never built an effective working engine of his own, but his idea was improved by others and led to the development of the steam engine, a major contribution to the Industrial Revolution. Papin’s Youth and Education…
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John Arbuthnot and the Laws of Chance

John Arbuthnot and the Laws of Chance

On April 29, 1667, Scottish physician, satirist and polymath John Arbuthnot was baptized. He is best remembered for his contributions to mathematics, his membership in the Scriblerus Club (where he inspired both Jonathan Swift’s Gulliver’s Travels as well as Alexander Pope), and for inventing the figure of John Bull. He published Of the Laws of Chance (1692), the first work on probability published in English, being his translation of a work by…
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Agner Erlang and the Mathematics of Telecommunication Traffic

Agner Erlang and the Mathematics of Telecommunication Traffic

On January 1, 1878, Danish mathematician, statistician and engineer Agner Krarup Erlang was born, who invented the fields of traffic engineering and queueing theory. He developed mathematical theories applying the theory of probability, while working for the Copenhagen Telephone Company. He provided significant insights for planning the operation of automatic telephone exchanges that proved so useful that his formulas were used by telephone companies in other countries. Youth and Education Erlang was born…
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