The speed of electromagnetic waves is the same for all ........

The oscillating electric field of an electromagnetic wave is given by $E_y = 30 \sin(2 \times 10^{11} t + 300 \pi x) \ Vm^{-1}$. Then,the value of the wavelength of the electromagnetic wave is

For a plane electromagnetic wave,which of the following quantities has an average value of zero?

$A$ microwave oven acts on the principle of:

Energy stored in electromagnetic oscillations is in the form of

The electromagnetic waves travel in a medium at a speed of $2.0 \times 10^{8} \ m/s$. The relative permeability of the medium is $1.0$. The relative permittivity of the medium will be (in $.25$)