1. The problem statement, all variables and given/known data White light spans the wavelength range be- tween about 400 nm and 700 nm. If white light passes through two slits 0.656 mm apart and falls on a screen 1.7 m from the slits, what is the distance between the first-order violet and the first-order red fringes? Answer in units of mm. 2. Relevant equations sin(theta) = m*lambda / d x = L*tan(theta) 3. The attempt at a solution I used the first equation to solve for theta for both red light (lambda = 700 nm) which gave theta = .061139 and violet light (lambda = 400 nm) which gave theta = .034936. I used the second equation to plug in theta and solve for x for each of them. I then subtracted the x value of violet from the x value for red and converted to mm. My final answer was 6.781 mm.