An airplane is made invisible to radar by coating it with a 7.0 mm thick layer of an antireflective polymer with the index of refraction n = 1.5.What is the maximum wavelength of radar waves for which the plane is made invisible?
A) 3.0 cm
B) 3.8 cm
C) 4.0 cm
D) 4.2 cm
E) 5.0 cm
Correct Answer:
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