題組內容

5. (10%) A uniform plane wave (UPW) is incident from free-space (μ1 = μ0,ε1 = ε0) onto a dielectric medium (μ2 = μ0,ε2 unknown) at an oblique incident angle.

(2). Please find the value of ε2 for which the critical angle for the total internal reflection =60°. (5%)