The ratio of the average electric energy density to the total average energy density of an electromagnetic wave is:

The magnetic field of an electromagnetic wave is given by $B_y = 3 \times 10^{-7} \sin(10^3 x + 3 \times 10^{11} t)$,where $x$ is in meters and $t$ is in seconds. The wavelength of the electromagnetic wave is: (in $cm$)

In an $EM$ wave propagating along the $X-$ direction,the magnetic field oscillates at a frequency of $3 \times 10^{10} \, Hz$ along the $Y-$ direction and has an amplitude of $10^{-7} \, T$. The expression for the electric field will be:

The oscillating electric and magnetic field vectors of an electromagnetic wave are along

In the propagation of electromagnetic waves,the angle between the direction of propagation and the plane of polarisation is (in $^{\circ}$)

If $E$ and $B$ denote electric and magnetic fields respectively,which of the following is dimensionless?