4 An electromagnetic wave in vacuum has the electric and

Last updated: 6/14/2023

4 An electromagnetic wave in vacuum has the electric and magnetic fields E and B which are always perpendicular to each other The direction of polarisation is given by X and that of wave propagation by k Then a X B and X BXE b X E and k Ex B c X B and k Ex B d X II E and k II Bx E