Question: Calculate the longest wavelength of light falling on double slits separated by 1200nm for which there is a first-order maximum. In what part of the spectrum is the light?(adsbygoogle = window.adsbygoogle || []).push({});

Answer in Book: 12nm

my problem: the formula i thought you would use is sin(theta) = m(wavelength)/d?? However you do not know an angle? any ideas??

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# Homework Help: Double Slit: Find Longest Wavelength

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