Envision an opaque screen () containing a circular hole of radius R. A point source S lies

Envision an opaque screen (Σ) containing a circular hole of radius R. A point source S lies on the central axis a distance ρ₀ in front of Σ and an observation point-P lies a distance r₀ beyond Σ, also on the central axis. If R = 1.00 mm, ρ₀ = 1.00 m, r₀ = 1.00 m, and λ₀ = 500 nm, determine how many Fresnel zones will be visible from P and if it will be brightly illuminated or not. Roughly what would the diffraction pattern look like on a vertical screen containing P?