oNyX ax CH FE at 80t E OH ae Ox at o t OE H. aE Ox at ax at OEx=o at OH=o ox OE aHaH aE μt ax Bx≥O0x OH aE ah, ah CE at ax at ax at t Ex =e x Hz  t Ey = e  x Hy  t Ez = e x Ez x Ey = t Hx m t Hy = m t Hz = m x  + Ex = 0 x  + Hx = 0 0 0 0 0 0 0 0 0 x Hz  t Ey =e  x Hy  t Ez =e x Ez t Hy = m x Ey t Hz = m x Hx = 0  t Ex = 0 = t Hx 0 x Ex = 0