[单选题]
12.30: Coherent ligh)ar1 u pceqrkb1y,m3)f),w1g ade yh.t of wavelength 550 nm shines on a double slit apparatus that has point slits spaced by a distance of 1,)h fad.wyeg42.4 $\mu$m. In theory, what is the maximum order bright fringe that can be viewed?
