# The Planck constant and its units

@article{Bunker2019ThePC, title={The Planck constant and its units}, author={Philip R. Bunker and Ian M. Mills and Per Jensen}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, year={2019} }

Abstract We urge spectroscopists to use the units cycle s − 1 or radian s − 1 , with an appropriate prefix such as kilo as needed, when expressing the value of a transition frequency; the hertz (Hz) should be explicitly defined as being cycle s − 1 . Currently, in The International System of Units (SI), the unit of angular measure (cycle or radian) is omitted and transition frequencies simply have the unit s − 1 which is called the hertz. The use of the symbols ν (or f) and ω is supposed to…

## 4 Citations

Angles in the SI: treating the radian as an independent, unhidden unit does not require the redefinition of the term ‘frequency’ or the unit hertz

- Physics, Mathematics
- 2020

Some recent papers have argued that frequency should have the dimensions of angle/time, with the consequences that 1 Hz = 2π rad/s instead of 1 s-1, and also that ν = ω and h = ħ. This letter puts…

Proposal for the dimensionally consistent treatment of angle and solid angle by the International System of Units (SI)

- Physics, Materials ScienceMetrologia
- 2021

Because of continued confusion caused by the SI’s interpretation of angle and solid angle as dimensionless quantities (and the radian and steradian as dimensionless derived units), it is time for the…

The Planck constant of action hA

- Physics
- 2020

Abstract We include the dimension of angle in the expression for the value of the Planck constant h. As a result it has the dimensions of action/angle. However, in the equations of quantum mechanics…

Outdoor Cultivation of the Microalga Chlorella vulgaris in a New Photobioreactor Configuration: The Effect of Ultraviolet and Visible Radiation

- Chemistry
- 2020

Microalgae can be a future source of biomass with a wide range of applications, including its use to solve current environmental issues. One of the main variables for microalgal cultivation is the…

## References

SHOWING 1-10 OF 16 REFERENCES

On the units radian and cycle for the quantity plane angle

- Mathematics
- 2016

This paper is concerned with the names and symbols for quantities used to describe oscillatory motion such as for a harmonic oscillator, and the units to be used for the quantity plane angle and…

Dimensionless units in the SI

- Physics
- 2015

The International System of Units (SI) is supposed to be coherent. That is, when a combination of units is replaced by an equivalent unit, there is no additional numerical factor. Here we consider…

On the Theory of quantum mechanics

- Mathematics
- 1926

The new mechanics of the atom introduced by Heisenberg may be based on the assumption that the variables that describe a dynamical system do not obey the commutative law of multiplication, but…

A Treatise on Electricity and Magnetism

- Materials ScienceNature
- 1873

IN his deservedly celebrated treatise on “Sound,” the late Sir John Herschel felt himself justified in saying, “It is vain to conceal the melancholy truth. We are fast dropping behind. In Mathematics…

Data and analysis for the CODATA 2017 special fundamental constants adjustment

- Physics
- 2018

The special least-squares adjustment of the values of the fundamental constants, carried out by the Committee on Data for Science and Technology (CODATA) in the summer of 2017, is described in…

Ueber das Gesetz der Energieverteilung im Normalspectrum

- Physics
- 1901

Die neueren Spekfralmessungen von O. Lummer und E. Pringsheim 4) und noch auffalliger diejenigen von H. Rubens und F. Kurlbaum 5), welche zugleich ein frUher von H. Beckmann 1) erhaltenes Resultat…

Fundamentals of Molecular Symmetry

- Physics
- 2004

PART 1: SPECTROSCOPY AND THE QUANTUM STATES OF MOLECULES Molecular spectroscopy Quantum mechanics Electronic states Vibrational states Rotational states PART 2: SYMMETRY AND SYMMETRY GROUPS…

Uber einen die Erzeugung und Verwandlung des Lichtes betreffenden heuristischen Gesichtspunkt

- Physics
- 1905

Este material fue digitalizado en el marco del Proyecto subvencionado por la Fundacion Antorchas y se encuentra en la Biblioteca del Departamento de Fisica de la Facultad de Ciencias Exactas de la…

- 2005