In a double-slit experiment, the distance between the slits is 0.5 mm and the distance to the screen is 1.5 m. If the wavelength of light is 600 nm, what is the separation between adjacent bright fringes?

Core Concept

The fringe separation in a double-slit experiment is given by Δy = λL/d, where λ = 600 nm = 6×10^-7 m, L = 1.5 m, and d = 0.5 mm = 5×10^-4 m. Therefore, Δy = (6×10^-7 × 1.5)/(5×10^-4) = 1.8×10^-3 m = 1.8 mm.