Chapter 28, Problem 27PCE

Predict/Calculate The interference pattern shown in Figure 28-45 (a) is produced by green light with a wavelength of λ = 505 nm passing through two slits with a separation of 127μm. After passing through the slits, the light forms a pattern of bright and dark spots on a screen located 1.25 m from the slits (a) What is the distance between the two vertical, dashed lines in Figure 28-45 (a)? (b) if it is desired to produce a more tightly packed interference pattern, like the one shown in Figura 28-45 (b), should the frequency of the light be increased or decreased? Explain.