The diagram below shows a plane boundary between two LIH dielectric materials with relative permittivities ε1 = 3.0 and ε2 = 2.0. The electric fields in each material are uniform, and in dielectric 2, the field strength is 25 V/m at an angle of 30°9' to the normal to the interface. There is no free charge at the boundary.
ε1 = 3.0
ε2 = 2.0
30°9'
E = 25 V/m
Calculate the electric field strength E1 and the angle θ1 between the direction of the electric field in material 1 and the normal to the interface, and enter your answers in the boxes below:
E1 =
V/m
θ1 =
degrees.