Two narrow slits are 0.2mm apart. They are illuminated by light from a tunable laser with a wavelength of 630nm, and the interference pattern is observed on a screen 64cm from the slits. (a) What is the angle between the zeroorder maximum and the first bright fringe? degrees (b) How far apart are the m = l and m = +1 bright fringes on the screen? cm b. ) y = 2La hope : the Formula For adjacent bright Fringes is y= La, but since d (2).(0-641 )(630 x10 9 m) the m= 1 and m = +2, we will assure it on both other side OF 0 . 00 02 m the screen, thus we will multiply = 0. 004032 m the distance () ) by 2 = 0. 4032 cm