An electromagnetic wave in vacuum has the electric and magnetic field E→ and B→, which are always perpendicular to each other. The direction of polarization is given by X→ and that of wave propagation by k→ . Then An electromagnetic wave in vacuum has the electric and magnetic field E→ and B→ which are always perpendicular to each other. The direction of polarization is given by X→ and that of wave propagation by k→ . Then June 9, 2021 Category: Cengage NEET by C.P Singh , Chapter 10 - Electromagnetic Waves , Part 2 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related