A plane electromagnetic wave is propagating in a lossless dielectric. The electric field is given by Ē(x,y,z,1)= E(Ⓡ+ A²)exp[ik, {_ct+ (x+x + √³ =)}]. [3 where c is the speed of light in vacuum, E, A and k are constant and and 2 are unit vectors along the x- and z-axes. The relative dielectric constant of the medium & and the constant A are 1 1 (a) &, = 4 and A = (b) &, = 4 and A = +- (c) &, = 4 and A = √√3 (d) ₁ = 4 and A = - -√3

A plane electromagnetic wave is propagating in a lossless dielectric. The electric field is given by Ē(x,y,z,1)= E(Ⓡ+ A²)exp[ik, {_ct+ (x+x + √³ =)}]. [3 where c is the speed of light in vacuum, E, A and k are constant and and 2 are unit vectors along the x- and z-axes. The relative dielectric constant of the medium & and the constant A are 1 1 (a) &, = 4 and A = (b) &, = 4 and A = +- (c) &, = 4 and A = √√3 (d) ₁ = 4 and A = - -√3