Convert **light speed (vacuum)** to **furlong/fortnight**

Selected category: speed.

Speed of light (c) in vacuum is equal to 299 792 458 meters/sec with a relative measurement uncertainty of 4 parts per billion. Up to 17^{th} century humanity wasn't sure if light was transmitted instantaneously or simply very quickly. The Danish astronomer, Ole Christensen Rømer first demonstrated that light travelled at a finite speed when he studied the apparent motion of Jupiter's moon Io.

Furlong per fortnight is a unit of velocity used to measure speed at sea. Furlong is equal to 201.168 meters and a fortnight is a traditional unit of time equal to 2 weeks. So one furlong per fortnight is 201.168 meters per 2 weeks or about 1.6631x10^{-4} m/sec.

Swap, do a furlong/fortnight to light speed (vacuum) conversion.