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Physics 18 Online
OpenStudy (anonymous):

When does the double-slit interference have its first dark spot on either side of the central peak intensity? **will draw image!** A. when the paths d_1 and d_2 differ by one wavelength B. when the paths d_1 and d_2 differ by half a wavelength C. when the waves arrive in step, or "in phase" with each other D. when the paths d_1 and d_2 have the same length

OpenStudy (anonymous):

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