Equation Icon  ¯ λE = 0, λB¯ = 0, 1 k l λ ¯Ei = −-𝜀klis ¯B , 2 λ ¯Bi = + 1𝜀klisk ¯El, 2 λEˆij = − 𝜀kl(isk ˆBlj), k l λBˆij = + 𝜀kl(is ˆE j),