The vector $\vec E$ and $\vec B$ of an electromagnetic wave in vacuum are
The vector $\vec E$ and $\vec B$ of an electromagnetic wave in vacuum are
- A
along the same direction but of phase by $90^o$
- B
along the same direction and in phase
- C
perpendicular to each other and in phase
- D
perpendicular to each other and out of phase by $90^o$
Similar Questions
Show that average value of radiant flux density $'S'$ over a single period $'T'$ is given by $S = \frac{1}{{2c{\mu _0}}}E_0^2$.
Show that average value of radiant flux density $'S'$ over a single period $'T'$ is given by $S = \frac{1}{{2c{\mu _0}}}E_0^2$.
Which scientist discarded postulate of ether?
Which scientist discarded postulate of ether?
The electromagnetic waves do not transport
The electromagnetic waves do not transport
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of $2.0 \times 10^{10}\; Hz$ and amplitude $48\; Vm ^{-1}$
$(a)$ What is the wavelength of the wave?
$(b)$ What is the amplitude of the oscillating magnetic field?
$(c)$ Show that the average energy density of the $E$ field equals the average energy density of the $B$ field. $\left[c=3 \times 10^{8} \;m s ^{-1} .\right]$
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of $2.0 \times 10^{10}\; Hz$ and amplitude $48\; Vm ^{-1}$
$(a)$ What is the wavelength of the wave?
$(b)$ What is the amplitude of the oscillating magnetic field?
$(c)$ Show that the average energy density of the $E$ field equals the average energy density of the $B$ field. $\left[c=3 \times 10^{8} \;m s ^{-1} .\right]$
$TV$ waves have a wavelength range of $1-10 \,meter$. Their frequency range in $MHz$ is
$TV$ waves have a wavelength range of $1-10 \,meter$. Their frequency range in $MHz$ is