Consider a Michelson interferometer that uses a sodium lamp as its source. A sodium lamp gives a...

Consider a Michelson interferometer that uses a sodium lamp as its source. A sodium lamp gives a large intensity at two wavelengths, 589.00 nm and 589.59 nm, in the yellow range of the visible spectrum. The mirrors are adjusted so that there is constructive interference with the Nth bright fringe for one of these wavelengths and the (N +1)st bright fringe for the other wavelength. Find N. Be careful with significant figures in your calculation, and give your answer for N to two significant figures.