일반물리학 2 — Interference: Problem 41

41 In a double-slit experiment, the distance between slits is 5.0 mm and the slits are 1.8 m from the screen. Two interference patterns can be seen on the screen: one due to light of wavelength 480 nm, and the other due to light of wavelength 600 nm. What is the separation on the screen between the third-order ($m = 3$) bright fringes of the two interference patterns?