Question: Light from a He-Ne laser ( = 632.8 nm) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen

Light from a He-Ne laser (λ = 632.8 nm) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.16 m from the slits. FIGURE 28-44 shows the interference pattern observed on the screen. What is the slit separation?

In figure 28-44

-23.0 mm-

-23.0 mm-

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