A plane light wave of wavelength 2 is incident normally on a grating consisting of 6 identical parallel slits a distance d apart. (a) At what angles with the normal are the interference maxima? (b) What is the angular width of the interference maxima, say from the maximum to the nearest null (zero intensity point)? (c) What is the ratio of the intensity at an interference maximum to the intensity obtained for a single slit? (d) Using a math software, make a plot of the interference pattern as a function of angle.

A plane light wave of wavelength 2 is incident normally on a grating consisting of 6 identical parallel slits a distance d apart. (a) At what angles with the normal are the interference maxima? (b) What is the angular width of the interference maxima, say from the maximum to the nearest null (zero intensity point)? (c) What is the ratio of the intensity at an interference maximum to the intensity obtained for a single slit? (d) Using a math software, make a plot of the interference pattern as a function of angle.