Electromagnetic waves travel in a medium which has relative permeability $1.3$ and relative permittivity $2.14$. Then the speed of the electromagnetic wave in the medium will be

For an $EM$ wave,the electric field intensity due to a bulb of $100\ W$ at a distance of $3\ m$ is $E$. What is the electric field intensity produced by radiations coming from a $50\ W$ bulb at the same distance?

$A$ plane electromagnetic wave propagates along the $+x$ direction in free space. The components of the electric field,$\overrightarrow{E}$ and magnetic field,$\overrightarrow{B}$ vectors associated with the wave in a Cartesian frame are:

Which of the following statements are true?
$A.$ Speed of light in vacuum is dependent on the direction of propagation.
$B.$ Speed of light in a medium is independent of the wavelength of light.
$C.$ The speed of light is independent of the motion of the source.
$D.$ The speed of light in a medium is independent of intensity.
Choose the correct answer from the options given below:

$A$ plane electromagnetic wave propagating in $x$-direction is described by $E_{y} = (200 \ Vm^{-1}) \sin [1.5 \times 10^7 t - 0.05 \ x]$. The intensity of the wave is: (Use $\epsilon_0 = 8.85 \times 10^{-12} \ C^2 \ N^{-1} \ m^{-2}$) (in $Wm^{-2}$)

In an $EMW$,the phase difference between electric and magnetic field vectors $\vec E$ and $\vec B$ is: