The pupil of an eagle's eye has a diameter of D = 6.2 mm and has about the same refractive index in its eye as does a human eye. The average index of refraction of the material in the eye is approximately n = 1.36. The eagle spots two field mice on the ground from an altitude of H = 120 m. The eagle sees them as one unresolved object and dives toward them at a speed of 22 m/s. Assume that the eagle's eye detects light that has a wavelength of 555 nm in vacuum. Determine how far apart the two mice must be on the ground for the eagle to see the mice as separate objects?