A Possible Means for Making an Airplane Radar-Invisible Is to Coat

question 38

Multiple Choice

A possible means for making an airplane radar-invisible is to coat the plane with an antireflective polymer.If radar waves have a wavelength of 6.00 cm,and the index of refraction of the polymer is n = 1.68,how thick would the coating be if a 180° phase change occurs at both surfaces?

• A)17.9 mm
• B)35.7 mm
• C)8.93 mm
• D)4.46 mm
• E)25.2 mm

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