A possible means for making an airplane invisible to radar is to coat the plane with an anti reflective polymer. If radar waves have a wavelength of 3.00 cm and the index of refraction of the polymer is `mu=1.5`. How thick is the oil film? Refractive index of the material of airplane wings is greater than the refractive index of polymer.

Explanation

To solve the problem of determining the thickness of the anti-reflective polymer film required to make an airplane invisible to radar, we can follow these steps:

### Step 1: Understand the Concept of Destructive Interference
To make the airplane invisible to radar, we need to achieve destructive interference of the radar waves reflected from the surface of the polymer film. This occurs when the path difference between the two waves is equal to an odd multiple of half the wavelength.

### Step 2: Identify Given Values
- Wavelength of radar waves, \( \lambda = 3.00 \, \text{cm} \)
- Refractive index of the polymer, \( \mu = 1.5 \)
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