موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ١٢_ه

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 12_H

⏹ Hertz, Heinrich Rudolf
Hertz Heinrich Randolph

German physicist (1857 - 1894)
Hertz was famous for discovering the waves named after him: Hertz waves • He learned in Berlin and then worked as a teaching assistant for Helmholtz. In addition to discovering the aforementioned waves, he also discovered electromagnetic radiation (electromagnetic) in what was called the ether. Hertz revealed that these waves, with respect to reflection, refraction and polarization, behave as light. Thus, he added new evidence to Maxwell's idea that light is an image of electromagnetic radiation. In recognition of Hertz's efforts in physics, the unit of oscillation was named after him: Hertz, meaning cycle per second.

⏹ It will rise, Oscar Hertwig, Oscar

German embryologist (1849 - 1922)
Hertwig received his education in Pena, Zurich, and Bonn, then returned to Pena to work in teaching, and soon left it for Berlin.
Hertwig's greatest achievement is his proof that only one sperm enters the egg to cause fertilization. To prove this, he used "gametes" (gametes cells of the sea urchin animal).

⏹ Hering, Ewald Hering, Ewald

American physiologist and psychologist
( 1835 - 1924 )
Hering worked as a lecturer in Leipzig, Germany, in 1862, then became a professor of physiology in Vienna and Prague, after which he returned again to Leipzig in 1895.
Hering is famous for his important research and studies on eye function, and he has developed new theories about color vision, memory, and so on.

⏹ Hirovsky, Yaroslav
Heyrovsky, Jaroslav

Czech chemist ( 1890 - )
Hirovsky studied and worked in London, then returned to Prague and worked as a teacher of natural chemistry at Charles University. After that, Hirovsky assumed the presidency of an important physical institute, which is the Institute of Polarography (1) Polarography, that is, the science of polarization. Chemical analysis in 1922. This invention was one of the important chemical achievements. Hirovsky was awarded the Nobel Prize for Chemistry in 1959 for his important contributions to the methods of electrochemical analysis.

⏹ Herophilus

Greek anatomist (250 BC)
Herophilus was a member of the Alexandrian school. He was the first to conduct an autopsy in front of spectators to compare the composition of the human body and the bodies of animals.
Herophilos concluded that the brain is the center of the nervous system, and distinguished in it a sensory section and a motor section, as he explained the difference between the arteries and he is responsible for naming the “duodenum and veins (for the end of the stomach 6 duodenum ten” connected to the intestine), and he was also the first to count the pulse and estimate its speed in relation to As usual, Herophilus described the ventricles of the brain, as well as the liver, spleen, and reproductive organs.

Hale, George Ellery

American astronomer (1868-1938)
Hill received his education at the Massachusetts Institute of Technology, worked as a professor of astrophysics (astrophysics) in Chicago, and worked as director of the Berks Observatory. He founded the famous Mount Wilson Observatory. Hill was the first to measure the diameter of the star (Alpha Orionis) by means of an interferometer. He invented a spectroheliograph, which expanded man's knowledge of the sun's atmosphere.
Hill proved that the magnetic poles on the one hand do not coincide with the geographic poles on the other hand in the sun, as is the case in the earth.
Thousands of books.