Below is a diffraction problem. I have the solutions to theproblem but I don't know how to arrive at these solutions.
A) In an experiment two slits are separated by 0.22mm andilluminated by light of wavelength 640nm. How far must a screen beplaced in order for the bright fringes to be separated by 5 mm?(1.72 m)
B) A soap film is illuminated by white light normal to itssurface. The index of refraction of the film is 1.50. Lightcorresponding to a wavelength in air of 600 nm is intensified inthe reflected beam. The smalled thickness of the film is.. (0.10micrometers)
C) Unpolarized light of intensity Io passes through a pair ofpolarizing filters with their axes making an angle of 38 degrees.What fraction of Io passes through? (0.31)