An electromagnetic wave in vacuum has the electric and magnetic field `vecE` and `vecB`, which are always perpendicular to each other. The direction of polarization is given by `vecX` and that of wave propagation by `vecK`. Then

Options

A. `vecX||vecB and veck||vecBxxvecE`
B. `vecX||vecE and veck||vecExxvecB`
C. `vecX||vecB and veck||vecExxvecB`
D. `vecX||vecE and veck||vecBxxvecE`

Answer

c

Explanation

Direction of polarization `vecX` is parallel to
magnetic field `vecB` , i.e., `vecX||vecB` and direction of
wave propagation `veck` is perpendicular to both `vecE`
as well as `vecB`, i.e., parallel to `vecExxvecB`.