Question

Define syandard metre

Answer 1

Hi friend , Here is the required answer:-

Standard metre is the length of path travelled by light in vacuum during a time interval of 1/299792458 of a second.

Hope this helps you...

Answer 2

i got this answer from web:-
The Standard meter is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.