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A pair of slits, separated by 0.170 mm, is illuminated by light having a wavelength of ? = 624 nm. An interference pattern is observed on a screen 152 cm from the slits. Consider a point on the screen located at y = 1.50 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.

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