A telephoto lens for a camera has focal length 0.250 m and maximum aperture f/4.0. Take the wavelength of visible light to be 5.50 x 10-7 m. Assuming that the resolution is limited by diffraction, how far away can an object be for you to be able to resolve two points on the object that are 5.00 mm apart?

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A telephoto lens for a camera has focal length 0.250 m and maximum aperture f/4.0. Take the wavelength of visible light to be 5.50 x 10-7 m. Assuming that the resolution is limited by diffraction, how far away can an object be for you to be able to resolve two points on the object that are 5.00 mm apart?

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