70. Coherent rays whose wavelengths in vacuo λ0 = 600 nm, come to a point with a geometrical path difference Δs = 1,2 m. Determine the maximum or minimum is observed at this point, if the beams are in the air (refractive index n1 = 1), the glass (n2 = 1,75) and turpentine (n3 = 1,5).

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