A light source simultaneously emits light of two wavelengths, 480 nm and 560 nm, respectively. The source is used in a double slit interference experiment where the slit spacing is a 0.040 mm, and the distance between the double slits and the screen is 1.2 m. What is the separation between the second- order bright fringes of the two wavelengths as they appear on the screen? (1 nm= 10^-9m)