Light of wavelength 440 nm passes through a double slit, yielding a diffraction pattern whose graph of intensity I versus angular position θ is shown in the figure. Calculate (a) the slit width and (b) the slit separation. (c) Verify the displayed intensities of the m = 1 and m = 2 interference fringes.
Concave lens; focal length 15 cm
Convex lens, focal length 20 cm
Screen
Source
cm
30 cm
50 cm
(degrees)