A pair of slits, separated by 0.180 mm, is illuminated by light having a wavelength of ? = 612 nm. An interference pattern is observed on a screen 130 cm from the slits. Consider a point on the screen located at y = 1.60 cm from the central maximum of this pattern.
(a) What is the path difference ? for the two slits at the location y?
µm
(b) Express this path difference in terms of the wavelength.
(c) Will the interference correspond to a maximum, a minimum, or an intermediate condition?