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Derive formula for diffraction of two slits in far field approximation. The width of each slit...

Derive formula for diffraction of two slits in far field approximation. The width of each slit is a, the distance between the slit centers d and a screen is placed at distance X from the slits where the diffraction pattern is observed (X>>a,d). Slits are illuminated with a plane wave that has wavelength lambda (lambda<<a,d).

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