Question

A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. If radar waves have a wavelength of 3.00 cm and the index of refraction of the polymer is n = 1.50, how thick would you make the coating?

Answer 1

`t=0.50cm`

Step-by-step explanation:

From the question we are told that:

Wavelength
`\lamda=3c`m

Refraction Index
`n=1.50`

Generally the equation for Destructive interference for Normal incidence is mathematically given by

`2nt=m((1)/(2))\lambda`

Since Minimum Thickness occurs at

At
`m=0`

Therefore

`t=(\lambda)/(2)`

`t=(3)/(4(1.50))`

`t=0.50cm`