attenuation of electromagnetic wave in metal problem
The conductivity of a metal is 3.2×10^7 (Ωm)^1 .Find the attenuation of an electromagnetic wave of frequency 2khz by a metal plate of thickness 0.1mm.
I found the skin depth using δ=(2/μωσ)^(1/2) = 1.989×10^3 m
Then 1/α= δ .so α = 502.65 m^1 is the attenuation coefficient.
But the answer given in the book is different.
It is: E (transmitted)/E (incident)=0.95.
Somebody help me understand the book answer.How is the author arriving at such a solution? Please refer me to few worked out examples on this topic if you can.
