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Optics: Angular Resolution

Q- If two point objects close together are to be seen as two distinct objects, the images must fall on the retina on two different cones that are not adjacent. That is, there must be an unactivated cone between them. Assume the separation of the cones is 0.8 µm. Model the eye as a uniform 2.2 cm diameter sphere with a refractive index of 1.34

(a) What is the smallest angle θ the two points can subtend? 

(b) How close can two points be if they are 50 m from the eye?

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