A pair of parallel thin slits, 0.15 mm apart, is used to produce an interference pattern on a screen 8 m from the slits. Coherent light of wavelength 450 nm is used.
(1) Calculate the separation of the bright fringes on the screen.
(2) Without redoing the calculation completely, how far apart would the bright fringes be if red light of wavelength 675 nm were used?
(3) If the screen were infinitely wide, determine how many bright fringes would be visible on the screen.