Answer | Crossword Clue |
---|---|
NSEC | Roughly, time it takes for light to travel one ft. |
NSEC | Approx. time it takes for light to travel one foot |
PSEC | Time it takes for light to travel .3 mm |
NSEC | About how long it takes light to travel a ft. |
PSEC | Time it takes light to travel .3 mm: Abbr. |
NSEC | Time required for light to travel about a ft. |