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

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

Cf. A003678, A230436, A230458, A213614, A230845, A322579.

Sequence in context: A005267 A209269 A373562 * A286157 A016460 A248645

Adjacent sequences: A244820 A244821 A244822 * A244824 A244825 A244826

Keyword

nonn,cons

Author

Omar E. Pol, Jul 06 2014

Status

approved