Chapter 27 of 41
The Formulæ.
Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis · Albert A. (Albert Abraham) Michelson
The formulæ employed are—
Substituting for d, its value or d×T×sec α (log sec α = .00008), and for D its value 3972.46, and reducing to kilometers, the formulæ become—
The electric fork makes ½(256.070 + B + cor.) vibrations per second, and n is a multiple, submultiple, or simple ratio of this.