What is Light-second?
A '''light-second''' is a [[Units of measurement|unit]] of [[length]] equal to the distance [[light]] in [[Vacuum|empty space]] travels in one [[second]], and is exactly 299,792,458 [[meter]]s.<ref>{{SIbrochure8th|page=112}}</ref> The light-second is used in [[telecommunication]]s, [[astronomy]], and [[physics]]. In telecommunications, it measures how much time it must take to send a [[signal]] a certain distance. == References == {{Reflist}} {{Sci-stub}} [[Category:Units of length]] [[Category:Light]]