Subject
3 free books about light -- speed, free to read online. Chapter 1 of any book is free, no account needed.
Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis
Albert A. Michelson
On the relative motion of the earth and the luminiferous æther
Michelson, Albert A. (Albert Abraham); Morley, Edward Williams
On the effect of the motion of a body upon the velocity with which it is traversed by light
H. Fizeau
