Question

Please solve this physics problem from optics course with clear detailed steps.

4(a) Two parallel narrow slits in an opaque screen are illuminated by a normally incident plane wave of wavelength 550 nm. The slits are separated by 0.10 mm. One of the slits is covered with a thin plastic sheet of thickness 50 μm and index 1.420. In what direction do the waves from the two slits interfere with zero phase difference?

4(b) Fringes of equal thickness are observed when light of wavelength = 600 nm is incident normally on to a wedge-shaped film of refractive index 1.50 in air. What is the angle of the wedge if the fringe separation is 0.05 cm?

Answer 1

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