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Stealth aircraft coating thickness

  • Thread starter Galahad43
  • Start date
  • #1
4
0

Homework Statement



Stealth aircraft are designed to not reflect radar, whose wavelength is typically around 3.0 cm, by using an antireflecting coating. Ignoring any change in wavelength in the coating, estimate its thickness.
____cm

Homework Equations




Well, that's just the issue. I haven't the foggiest idea how to solve this
Maybe something to do with 1/lambda^4?

The Attempt at a Solution



Searched both the book and internet for the relevant equation, and have not been able to find it. Tried just plain 1/lambda^3, didn't work

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
7
The antireflecting coating film should by such that signals reflected form top and bosom surface will be out of phase, i.e. the path difference should be λ/2.
Now find the thickness of the film.
 

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