Using Optics To Make An Aircraft "Invisible" 1. The problem statement, all variables and given/known data Does it seem possible (or practical) to make airplanes invisible to microwave radar by applying some kind of anti-reflection coating? 2. Relevant equations 3. The attempt at a solution I'm not sure what to say for this. I want to say that it is possible because it seems as if the government has such aircrafts, but I can't seem to think of a reason why. I thought about using Fresnel coefficient for reflection, but I got stuck. Thanks.