QJEEM23Ph86a3: JEE Main 2023 Physics - Class 12 JEEM23Ph86a3 Solution: In an electromagnetic wave, at an instant and at particular…

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 $\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}$ , 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 $\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}$ , 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.