Rensselaer Republican, Volume 18, Number 40, Rensselaer, Jasper County, 10 June 1886 — Light’s Speed. [ARTICLE]

Light’s Speed.

From two determinations by Michelson and one by himself, Prof. Simon Newcomb concludes that the velocity of light is 185,712 miles per second, with a probable error of about twenty miles. Neither Michelson nor Newcomb has found any evidence in support of the hypothesis of Forbes and Young that a difference exists in the rate raveled by rays of different colors.