The metre is defined as the distance travelled by light in 1/299,792,458 second.Why didn't people choose some easier number such as 1/300,000,000 second?Why not 1 second?

Asked by Rockstarshubhangi.mishra07 | 19th May, 2014, 12:09: PM

Expert Answer:

Speed of light is in vacuum 299,792,458 m/s.
Hence, metre is defined on the basis of this speed.
Taking some standard easier number would have yielded a small error in the standard value of metre.
One second is a big time interval when one wants to set a measure for some standard quantity to a very large accuracy.
Hence, taking one second is not feasible either.

Answered by Romal Bhansali | 19th May, 2014, 02:54: PM