April 3 in Physics History
Physics history will help you to develop a better understanding of the physics world!
birthdays & deaths
Explore all birthdays & deaths of physicists occurred on this day with their short biography!
physics Events
Know all important discoveries made by physicists & events happened on this day with complete information!
April 3 in Physics History - Births – Physicists born on April 3
Hermann Carl Vogel (3 Apr 1842 - 13 Aug 1907)
He was a German astronomer who discovered double-star systems that were too close for the individual stars to be notices by any telescope, also known as spectroscopic binaries. He studied the light received from distant stars and also introduced the use of photography in the field. The distant single stars were founded to be two individual stars circling each other.
Virgil I. Grissom (3 Apr 1926 - 27 Jan 1967)
He was an American pilot and astronaut who was the second American in space (1961) and one of the original “Mercury Seven” astronaut trainees. He also was the first Gemini pilot which was launched on 23 March 1965 with John W. Young. He first flew in space on 21 July 1961 in the Liberty Bell 7. During splashdown, due to some malfunctioning, the escape hatch blew prematurely but he managed to escape. He died in a fire that broke out while testing the Apollo I capsule in 1961.
April 3 in Physics History - Deaths – Physicists died on April 3
Ernst Florens Friedrich Chladni (30 Nov 1756 - 3 Apr 1827)
Also known as the “father of acoustics”, he was a German physicist.
He investigated sound waves by measuring
the speed of sound in various gases using an organ pipe which was filled with different gases. He determined the pitch of the organ pipe. He analyzed the nodal pattern in standing wave vibrations in long rods to determine the speed of sound in solids. He showed the Chladni figures to an audience of scientists in Paris in 1809. These complex patterns were generated when thin plates covered in the sand are set in vibration.
