From: utzoo!decvax!cca!knutsen@SRI-UNIX@sri-unix
Newsgroups: net.physics
Title: Re: Flickering train lights
Article-I.D.: sri-unix.3278
Posted: Tue Sep 14 20:33:58 1982
Received: Thu Sep 16 01:16:57 1982

From: Andrew Knutsen 
	The Michelson-Morley experiment is the oldest "proof" that
the speed of light does not change from one frame to another.
	The problem with the flashing train lights can be visualized
using the well-established length-contraction effect. The "track"
frame sees the train foreshortened, and the train sees the distance
between the lights on the track foreshortened. How can the lights
"line up"?