Sep 14, 2010 #1 K Kelly Member Joined May 13, 2008 Messages 639 Reaction score 0 Points 16 ...in a given time? what are the advantages in having the meter officially defined in terms of the distance light travels in a given time rather than as the length of a specific metal bar?
...in a given time? what are the advantages in having the meter officially defined in terms of the distance light travels in a given time rather than as the length of a specific metal bar?