One nanosecond (ns) is 10-9 s. Laboratory workers often estimate the distance light travels in a certain time

Question

One nanosecond (ns) is 10-9 s. Laboratory workers often estimate the distance light travels in a certain time by remembering the approximation "light goes one foot in one nanosecond." How far, in feet, does light actually travel in exactly 1 ns?

______________ ft

Answer 1

The speed of light in a vacuum is 299,792,459 m/s

which is 983,570,791.4 ft/s

So, in 1 nanosecond, it will travel 0.983 570 791 4 feet

or 11.802 849 5 inches

Answer 2

In air it is 30cm=11.8 inches in 1 nanosecond