Practice portal › Wave Optics › Interference and Young's Double Slit Experiment
Asked in GUJCET 2023 · Fringe width and fringe position
Given: d = 10 mm = 1×10⁻² m, D = 1.5 m, λ = 7000 A = 7×10⁻⁷ m.
Idea: the separation of neighbouring fringes is the fringe width β = (λ D)/d.
β = ((7×10⁻⁷)(1.5))/(1×10⁻²) = (1.05×10⁻⁶)/(1×10⁻²).
β = 1.05×10⁻⁴ m.
Written in micrometres that is 105 μm, about a tenth of a millimetre.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer