A beam of light with a wavelength l ~ 0.5 μm is incident on a Fabry-Perot interferometer, consisting of two identical mirrors. The interference pattern is observed in the focal plane of a lens with a diameter of D = 2.5 cm with a focal length of f = 10 cm and has the form of concentric rings. The first ring has a diameter d = 1 cm. Estimate the maximum resolution of the spectral device under these conditions.

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