Johann Heinrich Lambert’s profile picture

Johann Heinrich Lambert

Mathematician, Physicist and Astronomer
Johann Heinrich Lambert’s profile picture
Net worth 2018: Under Review
Industry: Scientists
Residence: Republic of Mulhouse, Independent city-state
Country: Swiss, German
BirthDay: 26 August 1728
Sigh: Virgo
Died On: September 25, 1777

Johann Heinrich Lambert was bornon 26 August 1728 in Republic of Mulhouse, Independent city-state, Swiss, German, is Mathematician, Physicist and Astronomer. Johann Heinrich Lambert was a Swiss mathematician, astronomer, physicist, and philosopher. He is especially well-known for being the first person to provide evidence that ‘Pi’ (ratio of the circumference of a circle to its diameter), is irrational, which means it cannot be expressed as the quotient of two integers. He was also the one who introduced hyperbolic functions into trigonometry. Lambert is also said to be the first mathematician who addressed the general properties of map projection. His contribution to physics was also immense. The hygrometer, which is an instrument to measure the moisture content in the atmosphere, was invented by him. He also did research on the measurement of light, and published a book on it named ‘Photometria.’ He is also remembered for his contribution to philosophy. He corresponded with Immanuel Kent and though the latter decided to dedicate his work ‘Critique of Pure Reason’ to Lambert, he died before the work was complete. Lambert, as an astronomer, developed a theory about the generation of the universe. It was similar to the nebular hypothesis formed by Thomas Wright and Immanuel Kant.


He passed away at the age of 49, on September 25, 1777


He published seven new map projections in 1772, though he didn’t give any names to any of them


He was also appointed into another committee, through which he contributed to land surveying and building administration, which led him to receiving the title of ‘Oberbaurat’ in 1770


In the field of philosophy, he wrote and published his first work ‘New Organon’ in 1764, in which he wrote about distinguishing subjective from objective appearances


In his book ‘Photometria’ which was published in 1760, he made three important assumptions: the illumination was proportional to the strength of the source, and inversely proportional to the source of the distance of the illuminated surface and the sine of the angle of inclination of the light’s direction to that of the surface


He also participated in the meetings of the Learned Society in Gottingen, and managed to earn a membership as a corresponding member when he left the city after the French occupation in July 1757


On 1756, he began an expedition to Europe with his students


Johann Heinrich Lambert was born on 26 August 1728 in the city of Mulhouse in Switzerland, (which is now in France)

(3.3/143 votes)
Related Person