and Maxwell’s constant

. This would indicate that the equations of electromagnetics would no longer maintain the same form when we changed Galilean frames. As a result, the erstwhile negative experiments in electromagnetics should now yield positive results, and absolute velocity through space would be detected. The theory of relativity would have to be abandoned.

But we may consider still another case. Suppose that the invariant velocity of the world were some imaginary quantity

, where

stands, as before, for