In the winter, a thin film of ice (n_ice = 1.31) can form on a window (n_glass = 1.50).
(a) The phase shift for light that reflects off of the air/ice interface (i.e. the front surface of the ice) has a phase shift of

(b)The phase shift for light that reflects off of the ice/glass interface (i.e. the back surface of the ice) has a phase shift of

(c) The equation 2t = m(?/n) for this problem describes

(d) The equation 2t = (m + 1/2)(?/n) for this problem describes

Consider the case that light reflected from the front and back surfaces of such a film of ice interferes constructively in the green region of the spectrum (544 nm).

(e) Calculate the minimum thickness of the film.
nm.