A244823 - OEIS

A244823

Decimal expansion of c/P in SI units (meters), where c is the speed of light in vacuum and P is the number of periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom in one second.

3, 2, 6, 1, 2, 2, 5, 5, 7, 1, 7, 4, 9, 4, 0, 5, 5, 5, 6, 7, 9, 4, 1, 0, 1, 8, 4, 8, 3, 7, 6, 3, 3, 2, 8, 2, 0, 3, 0, 1, 7, 9, 6, 9, 9, 0, 1, 7, 7, 9, 2, 8, 1, 2, 1, 2, 3, 0, 5, 1, 0, 2, 4, 8, 1, 0, 0, 5, 8, 2, 8, 4, 3, 2, 0, 9, 0, 0, 1, 9, 4, 1, 7, 8, 0, 1, 6, 1, 1, 7, 7, 9, 3, 4, 3, 5, 7, 7, 4, 7, 0, 4, 1, 5, 7

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

-1,1

COMMENTS

This is the number of meters in a "light-tick", where "tick" is a single caesium-133 transition, and the term "light-tick" is analogous to the well-known term "light-year" (A213614). - Robert B Fowler, Sep 23 2024

LINKS

Table of n, a(n) for n=-1..103.

Wikipedia, Second

FORMULA

c/P = A003678/A230458 = 299792458/9192631770 = 21413747/656616555.

a(n+3060150) = a(n), for n > -1. - Robert B Fowler, Sep 01 2024

Equals 1/A322579. - Hugo Pfoertner, Sep 23 2024

EXAMPLE

0.0326122557174940555679410184837633282030179699... meters.

MATHEMATICA

First[RealDigits[21413747/656616555, 10, 100]] (* Paolo Xausa, Sep 27 2024 *)

CROSSREFS