Solution to task 509 from Chertov´s for extramural stud

Solution to task 509 from Chertov´s for extramural stud

509. Between two plane-parallel plates at a distance of L = 10 cm from the border of their contact there is a wire with a diameter of d = 0.01 mm, forming an air wedge. The plates are illuminated with normally incident monochromatic light (λ = 0.6 μm). Determine the width b of the interference fringes observed in reflected light.