Physics history will help you to develop a better understanding of the physics world!
Explore all birthdays & deaths of physicists occurred on this day with their short biography!
Know all important discoveries made by physicists & events happened on this day with complete information!
He was an American astronaut who drove a wheeled vehicle on the moon on 31st July 1971. His crew was Neil Armstrong in Gemini 8, which was launched on 16 March 1966. They conducted the first docking in space. He flew on the Apollo 9 mission that was launched on 3 March 1969 for a 10 day Earth orbit test of the first complete set of Apollo hardware. He was in command of the Apollo 15 mission which made the fourth lunar landing. He became the seventh person to walk on the moon.
He was a Swiss physicist who shared the Nobel Prize for Physics with Gerd Binnig in 1986 for inventing the scanning tunneling microscope. The electron microscope of Ruska of the 1930’s was unable to show surface structure at the atomic level. They begin work on the scanning tunneling microscope in 1978 which used a fine probe within a few angstroms of the surface of the sample. A positive voltage on the probe enables electrons to move from the sample to the probe by the tunnel effect. The detected current can be used to keep the probe at a constant distance from the surface. 3D images of the surface can be traced as the probe moves in parallel lines.
He was a Canadian physicist who was the founding director of the Institute of Applied Optics at the University of Rochester. He secured photographic recordings of cosmic rays and the disintegration of Radium atoms. He announced the perfection of a camera that was able to record the footprints of invisible atoms after they collide in April 1939. He received a medal from the Royal Photographic Society of Great Britain because of his work on the use of photographic emulsion in the study of Radium emissions. He also developed a camera that could determine the energy levels inside the nuclei of stable chemical elements. He died of a heart attack.
He was a German physicist who developed the wireless telegraphy with Guglielmo Marconi. He got the Nobel Prize for Physics in 1909. He also demonstrated the first cathode-ray oscilloscope in 1897 when he worked on high-frequency alternating currents. He wrote papers on the deviations from ohm’s law and also on the calculations of electromotive force from thermal sources. He produced a narrow stream of electrons that had previously been characterized by uncontrolled rays.
He was a Flemish astronomer who was known as the Ptolemy of his time. Even though the church was against him, he was an audacious proponent of the Copernican theory. He believed that the planets orbit the sun. He calculated more accurate measurements of the distance to the sun from the geometrical relationships at the exact time of a half-moon. He noted the temperature effect on the period of a pendulum and also observed that as the amplitude is increased, the period of the swings also increases. Newton mentioned him in his Principia.
He was a German astronomer and mathematician who helped revive and advance trigonometry in Europe. He made observations of a comet that were accurate enough to allow it to be identified with Halley’s Comet in 1472. He observed several eclipses of the Moon and his interest in the motion of the Moon let him to understand that the method of lunar distances could be used to determine longitude at sea.
On thi day, Thomas Alva Edison was issued a patent for his filament for incandescent lamps and the process of manufacturing the same in 1899.
