SOLVED:A pinhole camera has no lens but uses a very small hole some distance from the film to form its image. If we assume that light travels in straight lines, then the image of a distant point source will be a blur whose diameter is the same size as the pinhole. However, diffraction will spread the light into an Airy disk. Thus, the larger the hole, the larger the geometrical blur but the smaller the diffraction pattern. Assume that the sharpest picture will be produced when the geometrical bl

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