A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer.
(a) If 100,000 MHz radar waves are incident on a plane coated with a polymer whose index of refraction is n = 1.50, how thick would you make the coating? Assume the index of refraction of the material the plane is made out of is higher than the polymer coating.
(b) If this plane was so awesome it could fly to a distant moon and operate under the surface of the moon's carbon disulfide (n - 1.63) ocean, what thickness coating would provide stealth capabili- ties from that same 100,000 MHz radar?