April 23 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 23 in Physics History - Births – Physicists born on April 23

Max Planck (23 Apr 1858 - 4 Oct 1947)

He was a German theoretical physicist who worked in the field of thermodynamics and the distribution of radiation from a black body. He studied under Helmholtz, Clausius, and Kirchhoff and subsequently joined the faculty. He became a professor of theoretical physics. He introduced the quantum theory after he abandoned the classical Newtonian principles in 1900. For this, he was awarded the Nobel Prize in physics in 1918. His theory assumes that energy is not infinitely subdivisible but it exists as discrete amounts called quanta.

April 23 in Physics History - Deaths – Physicists died on April 23

Max von Laue (9 Oct 1879 - 23 Apr 1960)

He was a German physicist who discovered the diffraction of X-rays in crystals. For this discovery, he was awarded the Nobel Prize for Physics in 1914. After his discovery scientists enabled to study the structure of crystals and hence marked the origin of solid-state Physics, an important field in the development of modern electronics.

Pyotr Petrovich Lazarev (13 Apr 1878 - 23 Apr 1942)

He was a Soviet physicist and biophysicist who developed the theory of the movement of ions and successive theory of nerve excitation in living matter. It explained the reason behind sensation, muscular contraction, and also the functions of the central nervous system. He studied mathematics and physics on his own and his doctoral thesis was an elementary investigation in prequantum photochemistry.

April 23 in Physics History - Events – Physics Events of April 23

The First American Satellite To Reach To The Moon's Surface

The Ranger 4 which became the first American satellite to reach the moon surface in 1962 was launched from Cape Canaveral, Florida. It landed on the moon three days later after traveling at 5963 mph. The distance traveled was about 29541 miles.

The Theory of Light

William Rowan Hamilton presented his Theory of Systems of Rays in 1827 at the Royal Irish Academy in Dublin. At the young age of 21 years, his work is on the important works in optics. His theory is led to the establishment of the wave theory of light.

Discovery of Top Qaurk

The physicist at the department of energy of Fermi National accelerator laboratory discovered the subatomic particle called the top quark in 1994.

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