Atomic01 - University of Cape Town
Atomic01 - University of Cape Town
Atomic01 - University of Cape Town
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PHY322S Atomic Physics .<br />
Fringe spacing in double slit experiment<br />
Maxima when d sin θ = nλ<br />
D ≫ d so use small angle<br />
approximation<br />
θ ≃ nλ/d<br />
so ∆θ ≃ λ/d<br />
Position on screen: y = D tan θ ≃<br />
Dθ<br />
Separation between adjacent<br />
maxima:<br />
∆y ≃ D∆θ<br />
∆y ≃ λD/d<br />
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