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Alvis
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Homework Statement
I was just curious, I know you can derive the critical angle using Snell's law..but could you use it using the Fresnel Equations of reflection, both of them?
Homework Equations
|r|=1 internal reflection of light
r(tm)=(n1cos(theta-i)-n2cos(theta-t))/(n1cos(theta-i)+n2cos(theta-t))
r(te)=(n2cos(theta-t)-n1cos(theta-t))/(n1cos(theta-t)+n2cos(theta-i))
I'm putting theta-t and theta-i to denote incident angle and transmittance angle
supposed to arrive at crit angle=arcsin(n2/n1)
The Attempt at a Solution
r(te)=
[(n2cos(theta-t)-n1cos(theta-t))/(n1cos(theta-t)+n2cos(theta-i))]^2=1r(tm)=
[(n1cos(theta-i)-n2cos(theta-t))/(n1cos(theta-i)+n2cos(theta-t))]^2=1