Solving a problem in physics section 34 point 77 optics

Solving a problem in physics section 34 point 77 optics

77. A point E on the screen spaced from the source S of monochromatic light (λ = 0,5 mm) at a distance of l = 1 m, are distributed two beams: SA (perpendicular to the screen), and SBA (reflected at point B from the mirror parallel ray SA). Determine what will occur at point A - strengthening or weakening the intensity if the distance d from the plane mirror to the beam SA is 2.5 mm.

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