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User:Samboy

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SEMI-RETIRED

This user is no longer very active on Wikipedia as of May of 2020.

I have a website and a blog.

I have, over the years, contributed a number of images to the Wikipedia.

My preferred gender pronouns are he/him/his.

The Fine-structure constant:

$\alpha ={\frac {e^{2}}{2\varepsilon _{0}hc}}\approx {\frac {1}{137}}$

where

$e$ is the elementary charge (1.602176634×10⁻¹⁹ C‍^[1]);
$h$ is the Planck constant (6.62607015×10⁻³⁴ J⋅Hz⁻¹‍^[2]);
$c$ is the speed of light (299792458 m⋅s⁻¹‍^[3]);
$ε$ ₀ is the electric constant (8.8541878188(14)×10⁻¹² F⋅m⁻¹‍^[4]).

^ "2022 CODATA Value: elementary charge". The NIST Reference on Constants, Units, and Uncertainty. NIST. May 2024. Retrieved 2024-05-18.
^ "2022 CODATA Value: Planck constant". The NIST Reference on Constants, Units, and Uncertainty. NIST. May 2024. Retrieved 2024-05-18.
^ "2022 CODATA Value: speed of light in vacuum". The NIST Reference on Constants, Units, and Uncertainty. NIST. May 2024. Retrieved 2024-05-18.
^ "2022 CODATA Value: vacuum electric permittivity". The NIST Reference on Constants, Units, and Uncertainty. NIST. May 2024. Retrieved 2024-05-18.

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