In metric units, the speed of light in a vacuum is 299,792,458 metres per second (1,079,252,849 km/h). In imperial units, the speed of light is about 670,616,629.4 miles per hour or 983,571,056.4 feet per second (roughly one foot per nanosecond), which ...

adica 277.....7  e formata din 163 de cifre, asa sustine Vasile Droj care a descoperit in urma cu un sfert de secol formula matematica prin care viteza luminii poate fi depasita. Viteza cunoscuta este:  299 792 458 m / s sau ...