In a double-slit interference experiment, the slits are separated by a distance 0.40 mm and are illuminated with light of wavelength 600 nm. The interference pattern is observed on a screen 2.0 m away from the plane of the slits.
a) Calculate the linear fringe width on the screen.
b) Determine the angular position of the third bright fringe on one side of the central maximum.
c) Hence find the distance of this third bright fringe from the central bright fringe on the screen.