Before Ole Rømer made the first successful estimate of the speed of light in 1676, it was not known whether the speed of light (c) was infinite or not. Because of the tremendously large value of c (i.e. 299,792,458 metres per second in vacuum) compared to the speeds of things in our daily experience, the propagation of light seems to us to be instantaneous. Hence, the ratio 1/ c was hidden from our view making relativistic mechanics irrelevant. At speeds comparable to the speed of light (c), special relativity takes the finitude of the speed of light into consideration by the aid of Lorentz transformation. A non-relativistic theory is recovered from a relativistic theory when the limit 1/ c is set to zero.