![Figure 5](uneq_arm_int.png)
Figure 5: Schematic diagram of the unequal-arm Michelson interferometer. The beam shown
corresponds to the term
in
which is first sent around arm 1 followed
by arm 2. The second beam (not shown) is first sent around arm 2 and then through arm 1. The
difference in these two beams constitutes
.
![2 2 (𝒟 2 − 1)(𝒟1 − 1)ϕ(t)](article281x.gif)
![X (t)](article282x.gif)
![X (t)](article283x.gif)