Almost done guys :) If the first order bright lines formed by two slits at a distance of 2 meters are 3 cm apart, find the wavelength of the light if the slit seperation is 9.12x10^-3 cm. So, to find the wavelength, this is what I did. wavelength = 9.12 * 10^-5m * (2m/(3*10^-2m)) = .00608m. i'm not understanding what i am doing wrong. any input would be helpful. Thanks!