Solving a problem in physics section 42 point 25 optics

Solving a problem in physics section 42 point 25 optics

25. Diffraction occurs at a distance of 1 m from the point source of monochromatic light (λ = 0,5 mm). Midway between the light source and the screen is a circular aperture diaphragm. Determine the radius of the hole, where the center of the diffraction rings on the screen is the most dark.

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)