#lights go through two opening at fixed phase relationship
same sum -> ellipse, same difference in lengths -> hyperbola
r reflectivity ... amplitude ratio $r = \frac{n_1 - n_2}{n_1 + n_2}$
fringe
Lec 20 | MIT 8.03 Vibrations and Waves, Fall 2004
same sum -> ellipse, same difference in lengths -> hyperbola
r reflectivity ... amplitude ratio $r = \frac{n_1 - n_2}{n_1 + n_2}$
fringe
Lec 20 | MIT 8.03 Vibrations and Waves, Fall 2004
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