diffraction pattern on a single slit of width 0.5 cm is formed by a lens of focal length 40cm.calculate b/w the first dark fringe new fringe from the wavelength is 4850armstrong
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Now for distance between first dark and first bright is....
Maxima minus minima....
that is.....
(5.868*10^-5)-(3.912*10^-5)
=1.956*10^-2 mn
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