503 978 Let region 1 (z<0) be composed of a uniform dielectric material with a dielectric constants,, while region 2 (z>0) is characterized by another dielectric constant & In region1, let D1= wx+vy+uz C/m². Please find 1. Dn1 vector; 2. Dt1 vector; 3. Angle between z axis and D₁ in region 1: 0,;

503 978 Let region 1 (z<0) be composed of a uniform dielectric material with a dielectric constants,, while region 2 (z>0) is characterized by another dielectric constant & In region1, let D1= wx+vy+uz C/m². Please find 1. Dn1 vector; 2. Dt1 vector; 3. Angle between z axis and D₁ in region 1: 0,;