Question: What minimum aperture, in millimeters, is required for opera glasses (binoculars) if an observer is to be able to distinguish the sopranos individual eyelashes (separated

What minimum aperture, in millimeters, is required for opera glasses (binoculars) if an observer is to be able to distinguish the soprano’s individual eyelashes (separated by 0.5 mm) at an observation distance of 25 m? Assume the effective wavelength of the light to be 550 nm.

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