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`
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