# 299,792,458 meters/second

### SI OFFICIAL LABORATORY MEASUREMENT IN A VACUUM

10% of the speed of light: 29,979,245.8 m/s
1% of the speed of light: 2,997,924.58 m/s
.1% of the speed of light: 299,792.458 m/s
.01% of the speed of light: 29,979.2458 m/s
.001% of the speed of light: 2,997.9245 m/s
.0001% of the speed of light: 299.79245 m/s

From Notation 1 to 202 (that is from the first moment of time to the current time), the simple calculation, c = ℓP ÷ tP, renders a  variable speed of light, all well within .1% of the laboratory value.  To explore those numbers, see line 10 within our horizontally-scrolled chart.

# 299,792,422.79 meters/second

##### Planck Length divided by Planck time equals 299,792,434.14 meters/second.

From the Planck units, the difference is just 35 meters/second, less than .0001% difference from the current SI standard rating in 2019. In the following notations the fastest interval  is within Notation 16 where it is at 299,982,157.27 meters/second.  The slowest calculation is within notation 76 which is 299,759,426.55 meters/second. The difference from the fastest to the slowest is 222,720.72 m/s.  From the fastest interval there is a 189,699.27 m/s difference. From the slowest interval, there is just 33,031.45 m/s difference.

# 299,774, 296.4 meters/second

##### At One Second, between notations 143 to 144, the speed of light

“In 1899 Max Planck defined Planck Time as the unit of time (in a system of natural units or “Planck units”) whereby light travels the distance of one (1) Planck length in a vacuum. Using Planck Length — 1.616255×10-35 meters — divided by Planck Time — 5.391247×10-44 seconds — renders 299,792.4228 meters per second.”

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