Electromagnetic wave

 

 

E = electric field

 

B = magnetic field

 

E = E_o.cos 2 p n t

D₀₁ = |µ₀₁|²= 1,63.10^-38. e_max.Dl /l

D₀₁ near 0 --> forbidden transfer

D₀₁ near 1 --> normal transfer