1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Derivation of reflectivity

  1. May 31, 2012 #1
    1. The problem statement, all variables and given/known data
    Considering a wave traveling in air (permittivity and permeability 1), when the wave hits the surface of a solid, there is a reflected wave back into air, and a transmitted wave into the material. Assuming the material has a permeability of 1 and the wave hits the material at normal incidence, derive an equation for the reflectivity in terms of the index of refraction of the material and extinction coefficients.

    2. Relevant equations
    B = √(εμ) * E where ε is the permittivity and μ is the permeability
    n = √(εμ)

    3. The attempt at a solution
    I believe that this has something to do with the Fresnel equations, though i'm not too familiar with them. Otherwise i'm not sure where to begin with this. I don't see how to relate E and B to refractive index and extinction coefficients.
    Last edited: May 31, 2012
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted