The solution of the problem 3.32 кр 3 from the problem

The solution of the problem 3.32 кр 3 from the problem

Task 3.32
The diffraction pattern is observed at a distance of 0.8 m from the point source of a monochromatic
Light (? = 0.625 μm). In the middle between the screen and the light source is placed a diaphragm with a round
Hole. At what is the smallest diameter of the hole the center of the diffraction pattern will be dark?