Q16: Separation between bright fringes of parallel beam
A parallel beam is light of wavelength 4.5 × 10^-7 m is incident on a pair of slits that are 5.0 × 10^-4 m apart. The interference pattern is focused on a screen 2.0 m from the slits. The separation between two adjacent bright fringes is most nearly. λ = 4.5 × 10^-7 m d = 5.0 × 10^-4 m L = 2.0 m Equations: λ = (dx)/L => x = (λL)/d x = ((4.5 × 10^-7 m)(2.0 m))/( 5.0 × 10^-4 m) x = 1.8 × 10^-3 m