The SI unit of length, being the length of the path travelled by light in vacuum during a time interval of 1/ (2.99 792 458 × 108) second.
Mfungo wa mitara i m.[3] Mitara yi hlamuseriwa kuri mpfhuka lowu fambiwaka hi rivoningo e ndzeni ka xihava-moya hi nkarhi wa sekende yin'we loko yi avanyisiwa hi 299 792 458.[1]