Question 63: EM waves

Question

In an electromagnetic wave, at an instant and at particular position, the electric field is along the negative $z$-axis and magnetic field is along the positive $x$-axis. Then the direction of propagation of electromagnetic wave is:

Accepted Answer

As the electric field is along the negative $z$-axis and the magnetic field is along the positive $x$-axis, the direction of propagation of the wave is given by the vector product $\overrightarrow{\mathrm{E}} 	imes \overrightarrow{\mathrm{B}}$, which is in the direction of the negative $y$-axis.
Using the right-hand rule, if you point your right thumb in the direction of the vector product $\overrightarrow{\mathrm{E}} 	imes \overrightarrow{\mathrm{B}}$, your fingers will curl in the direction of the propagation of the wave. In this case, the fingers would curl in the direction of the negative $y$-axis.
Therefore, the direction of propagation of the electromagnetic wave in this scenario is along the negative $y$-axis.

Answer

at $45^{\circ}$ angle from positive y-axis

Answer

positive $y$-axis

Answer

negative $\mathrm{y}$-axis

Answer

positive z-axis

EM waves

In an electromagnetic wave, at an instant and at particular position, the electric field is along the negative z-axis and magnetic field is along the positive x-axis. Then the direction of propagation of electromagnetic wave is:

Choose the correct answer: