Problem: A parallel beam of light from a He-Ne laser, with a wavelength 633 nm, falls on two very narrow slits 0.050mm apart.
Part A: How far apart are the fringes in the center of the pattern on a screen 3.9m away?
I want help to find how far apart are the fringes in the center of the pattern on a screen 3.9m away and express your answer to two significant figures and include the appropriate units.