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Quantum physics (quantum theory, quantum mechanics)

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Fringe spacing in double slit experiment<br />

Maxima when:<br />

d<br />

sin<br />

<br />

n<br />

D >> d use small angle approximation<br />

<br />

n<br />

d<br />

y<br />

<br />

<br />

<br />

d<br />

d<br />

θ<br />

d sin<br />

Position on screen:<br />

y Dtan<br />

D<br />

separation<br />

between adjacent<br />

maxima:<br />

y<br />

D<br />

D<br />

y<br />

<br />

d<br />

D<br />

21

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