Consider a flat 5-mm-thick slab of glass with r = 2:56.
(a) If a beam of green light (0 = 0:52 μm) is normally incident upon one of the sides of the slab, what percentage of the incident power is reflected back by the glass?
(b) To eliminate reflections, it is desired to add a thin layer of antireflection coating material on each side of the glass. If you are at liberty to specify the thickness of the antireflection material as well as its relative permittivity, what would these specifications be?