Oops sorry... I do have the equation written down the right way around, I just mistyped it.
Is it simply just a matter of finding N for each wavelength and taking the largest answer, then? It almost feels too simple after all the time I've spent thinking about it.
Homework Statement
"A source emits light with two monochromatic components of wave-lengths λ1 = 510.50 nm and λ2 = 510.90 nm. Using the Rayleigh criterion, find the minimum number of slits of a grating that must be illuminated by a beam from the source in order to resolve these components."...