Daniel Gabriel Fahrenheit

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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Ole Rømer and the Speed of Light

Ole Rømer and the Speed of Light

Ole Rømer at work On October 5, 1644 (or according to the old julian calendar September 25), Danish astronomer Ole Christensen Rømer was born. He is best known for making the first quantitative measurements of the speed of light. Ole Rømer enrolled at the University of Copenhagen in the 1660s and learned from famous scientists like Rasmus Bartholin. Bartholin discovered double refraction of a light ray by Iceland spar and became famous…
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