1. Assuming that the resolving power of the eye is 0.008 deg, at what distance can a black circle 4 mm in diameter be seen on a white background?

2. Can this eye separate two objects subtending an angle less than 0.008 deg?

3. If you think this eye cannot separate two objects subtending an angle less than 0.008 deg, calculate the magnifying power achieved using full resolving power of a lens with a 55 mm diameter. Assume separately (a) green 550 nm and (b) 750 nm illumination.