موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ي

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter Y

⏹ Jakobi, Carl Gustav Jakob
Jacobi, Karl Gustav Jacob

German mathematician (1804 - 1851)
Jacobi studied in Berlin and then worked as a professor of mathematics in Kingsburg. Jacobi was famous for his studies on elliptic functions.
And differential equations. He also presented the theory of the multiplier, The last. Jacobi was one of the founders of the determinants theory. Jacobi authored a great reference entitled: Fundamenta Nova Theoriae Functionum Ellipticarum, in the year 1829.

⏹ Jansen (Jansen) Zakharias
Zacharias Jansen,

Dutch optometrist (from the seventeenth century).
Jansen is known for inventing the telescope, and the funny thing is that he came up with this accidentally while placing two lenses, one assembled and the other concave in a tube. He noticed the events of these two lenses for zooming (i.e. the telescopic effect).
And there are those who say that Hans Lippershey is the inventor of the first Hans Lippershey telescope.

⏹ Yang, Thomas Young, Thomas

English physician and physicist (1773-1829)
Yang is best known for his discovery of the role of ciliary muscles in controlling the curvature of the crystalline lens in the eye. After that, he was chosen as a Fellow of the Royal Society at the age of twenty-one, and he also worked at St. George's Hospital. Yang was a clear genius since his childhood. He was proficient in literature, modern languages, and science, and trained as a physician at Edinburgh, Gettingen, and Cambridge.
Yang was characterized by the purity of his biography and honesty, and these features often prevented his progress. He is the one who said that diagnosis is nothing more than a process of balancing possibilities. Yang developed a theory about color vision that was developed by Helmholtz from 1821-1894. The latter concluded that a limited number of receptors (three) are in the retina.
It vibrates in the natural vibration of the colors
The three principals of light, namely: red, blue, and yellow.
Yang worked at the Royal Institute as a professor of natural philosophy, and to him is attributed the discovery of the interference of light · He was famous for his research on the laws that govern this phenomenon, which helped a lot in establishing the wave theory.
Yang was so erudite that in his late days he became responsible for interpreting the inscription on the Rosetta Stone (in Egypt). He also assumed the secretariat in the longitude office, and supervised the marine (climate) calendar.

⏹ Yang, Chen Ning Yang , Chen Ning

Chinese American physicist (1922 - )
He is the son of the famous athlete Ko Chuan Yang. Chen Ning Yang was educated in America and became a professor at Princeton University in 1955.
In 1957, he was jointly awarded with Tsung Dao Lee the Nobel Prize in Physics for their experimental research that proved the invalidity of the equivalence law in molecular physics.

⏹Persan (Yersin), Alexandre Emile John Yersin

Swiss-French bacteriologist (1863-1943)
Yersan received his education in Lausanne, Marburg, and Paris, then worked with the scientist Roux (1853-1933) at the Pasteur Institute to study anti-diphtheria toxins. Then, Ersan traveled to China, where he made some explorations, and he discovered the bacillus plague germs in the year 1894, at the same time that the Japanese scientist Kitasato discovered it in 1856. 1931