Which of the following best describes the relative orientations of the electric field

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

\mathbf{E}

, the magnetic field

\mathbf{B}

, and the direction of propagation

\mathbf{k}

for any plane electromagnetic wave traveling in vacuum? (a)

\mathbf{E}

is parallel to

\mathbf{k}

, while

\mathbf{B}

is perpendicular to both (b)

\mathbf{E}

is perpendicular to

\mathbf{B}

, and the propagation vector

\mathbf{k}

lies in the same plane as the two fields (c) All three vectors

\mathbf{E}

\mathbf{B}

, and

\mathbf{k}

are mutually perpendicular (d)

\mathbf{E}

and

\mathbf{B}

are parallel to each other and both are perpendicular to

\mathbf{k}