12 Sep
1997
12 Sep
'97
12:28 a.m.
Quote from Jim Steinhardt's <jsteinha@cisco.com> personal message:
a) light is slower in dense media
The index of refraction of glass is 1.5 vs 1.0 for a vacuum. Hence, the speed of light in glass is 2 * 10 **8 m/s.
That gives 60 ms RTT on 4000 mile line. Case closed. Thanks, Jim! --vadim