Quote Originally Posted by eestlinc
not sure off the top of my head, but he probably studied the relationship between energy and velocity, realized it was a direct relationship, and calculated the constant from the ratio of the two.
its not a V, its a "nu" (greek letter for N whose simbol is a curled v) and it represents the frecuency of the light wave.

http://www.colorado.edu/physics/2000...electric2.html