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What is fringe shift?

  1. Jan 23, 2005 #1
    I'm working on a modification of Fizeau's experiment in 1851 about the addition of velocities. I've derived the formula for the fringe shift. But the problem is I actually don't know what it is. I know it's the movement of the interference pattern. But it has no unite, so what is the meaning of a fringe shift of let's say 0,3. Or how can I determine the fringe shift in the interference pattern?
  2. jcsd
  3. Jan 23, 2005 #2
    Maybe you calculated the "phase shift" and then is obvious you got something adimensional (that is rad) ...... :confused:
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