Physics

Inertial frame of reference

In classical physics and special relativity, an inertial frame of reference (also called inertial space, or Galilean reference frame) is a frame of reference not undergoing any acceleration.

https://en.wikipedia.org/wiki/Inertial_frame_of_reference#:~:text=In%20classical%20physics%20and%20special,reference%20not%20undergoing%20any%20acceleration.

Inertial frame of reference was last modified: January 8th, 2024 by Jovan Stosic

B2FH paper

The B2FH paper was a landmark scientific paper on the origin of the chemical elements. The paper’s title is Synthesis of the Elements in Stars, but it became known as B2FH from the initials of its authors: Margaret BurbidgeGeoffrey BurbidgeWilliam A. Fowler, and Fred Hoyle. It was written from 1955 to 1956 at the University of Cambridge and Caltech, then published in Reviews of Modern Physics in 1957.

The B2FH paper reviewed stellar nucleosynthesis theory and supported it with astronomical and laboratory data. It identified nucleosynthesis processes that are responsible for producing the elements heavier than iron and explained their relative abundances. The paper became highly influential in both astronomy and nuclear physics.

https://en.wikipedia.org/wiki/B2FH_paper

B2FH paper was last modified: April 18th, 2023 by Jovan Stosic

Ultraviolet catastrophe

The ultraviolet catastrophe, also called the Rayleigh–Jeans catastrophe, was the prediction of late 19th century/early 20th century classical physics that an ideal black body at thermal equilibrium would emit an unbounded quantity of energy as wavelength decreased into the ultraviolet range.

The term “ultraviolet catastrophe” was first used in 1911 by Paul Ehrenfest, but the concept originated with the 1900 statistical derivation of the Rayleigh–Jeans law. The phrase refers to the fact that the Rayleigh–Jeans law accurately predicts experimental results at radiative frequencies below 100 THz, but begins to diverge from empirical observations as these frequencies reach the ultraviolet region of the electromagnetic spectrum.

Since the first use of this term, it has also been used for other predictions of a similar nature, as in quantum electrodynamics and such cases as ultraviolet divergence.

https://en.wikipedia.org/wiki/Ultraviolet_catastrophe

Ultraviolet catastrophe was last modified: February 18th, 2023 by Jovan Stosic