1. The problem statement, all variables and given/known data A double-spit experiment is performed with light of wavelength 600 nm. A wide viewing screen is 2m behind the grating. What is the distance between the two m=2 bright fringes on the screen? The slit separation given is 0.1 mm. 2. Relevant equations Given the wavelength and distance I am assuming y = mλL/d makes the most sense for the equation to solve this problem. 3. The attempt at a solution I make d=(.1*10^-3) Wavelength given=600 nm so I make that (600*10^-9) and my distance and screen are both 2 so I enter the equation as: y=((2)(2)*(600*10^-9)/(0.1*10^-3) = (2.4*10^-2) mm as my solution. It looks weird as an answer though. Did I tackle this problem correctly?