Question

When are two objects just resolved? Explain.

Answer 1

Two point objects are said be just resolved when the central maximum of the diffraction pattern of one lies on the first secondary minimum of the other. The two objects are said to be well-resolved, when the separation of the central maximum of the two objects is greater than the distance between the central maximum and first minimum of any of the two objects. If the separation between the central maximum of the two objects is less than the distance between the central maximum and first minimum of any of the two objects, then the objects cannot be seen distinctly and hence, are said to be unresolved.