In a double-slit experiment it is found that blue light of wavelength 478 nm gives a second-order maximum at a certain location on the screen. What wavelength of visible light would have a minimum at the same location?(adsbygoogle = window.adsbygoogle || []).push({});

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I have no clue how to approach this problem but looking in the book I assumed the wavelength with a minimum at that same location should be 3rd order (m=3) so I set up an equation as follows:

m1*Lambda(max) = m2*Lambda(min)

Lambda(min) = m1*Lambda(max)/m2 = (2*478*10^-9)/3 = 319 nm

Apparently it's wrong. I'm lost on where to go from here.. Any help ??

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# Double Slit Diffraction Problem

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