Questlon 1 0 3 points Save Answer A Michelson interferometer is adjusted so that the two arms have exactly the same length. The interferometer has a "compensating" plate added to one arm so that the extra path through the glass of the beam splitter is matched in the arm that does not have that. Now we move one mirror back a distance until the fringes have shifted exactly one whole cycle. What had been a dark fringe with destructive interference has moved over to replace the next dark fringe in the pattern. How far did we move the mirror? Assume that we are using light from a mercury lamp, which emits green light with a wavelength of 546 nm. E] 1092 nm E] 2184 nm E] 546 nm E] 273 nm