Properties of Electromagnetic Waves

An electromagnetic wave is travelling in a medium with a velocity $\overrightarrow{v}=v\widehat{i}$ . The electric field oscillations, of this electromagnetic wave wave, are along the y – axis.

(a) Identify the direction in which the magnetic field oscillations are taking place, of the electromagnetic wave wave.

(b) How are the magnitudes of the electric and magnetic fields in the electromagnetic wave related to each other?

The photon radius is-

What is the momentum of photon?

An example of a photon is a carrier of an _____ force.

Is light made of photons. This statement is true or false?

What exactly is a photon?

The electric field of a plane electromagnetic wave propagating along the z-axis varies with time with an amplitude of $2\mathrm{ }\mathrm{V} {\mathrm{m}}^{-1}$. The average energy density of the magnetic field (in $\mathrm{J}\mathrm{ }{\mathrm{m}}^{-3}$) is :

Take: ${\mathrm{\epsilon }}_0=8.854\times {10}^{-12} \mathrm{F} {\mathrm{m}}^{-1}$

Electric field amplitude of electromagnetic wave is $240 {\mathrm{NC}}^{-1}$ and frequency $50 \mathrm{MHz}$, if the wave is propagating along $\mathrm{x}-\mathrm{axis}$ then equation of wave for electric field is

Magnitude of wave vector is reciprocal to wavelength and direction perpendicular to wavelength.

Electromagnetic waves propagating along $\mathrm{x}-\mathrm{axis}$, the equation for electric field along $\mathrm{y}-\mathrm{axis}$ is expressed as ${\mathrm{E}}_{\mathrm{y}}={\mathrm{E}}_0 \sin 2\mathrm{\pi }\left(\frac{\mathrm{x}}{\mathrm{\lambda }}-\frac{\mathrm{t}}{\mathrm{T}}\right)$, the wave vector is 

Calculate the amplitude of electric field (in $\mathrm{N} {\mathrm{C}}^{-1}$) in a parallel beam of light of intensity $4 \mathrm{W} {\mathrm{m}}^{-2}$.

Which of the following pairs of space and time-varying $E$ and $B$ fields would generate a plane electromagnetic wave travelling in the $(+x)$ direction?

Wavelength of EM waves varies from ______ to ________

The electric field of a plane electromagnetic wave varies with time with an amplitude of $2\mathrm{ }\mathrm{V} {\mathrm{m}}^{-1}$ propagating along $z$ -axis. The average energy density of the magnetic field (in $\mathrm{J}\mathrm{ }{\mathrm{m}}^{-3}$ ) is (Take: ${\mathrm{\epsilon }}_0=8.854\times {10}^{-12} \mathrm{F} {\mathrm{m}}^{-1}$)

The amplitude of the magnetic field of a harmonic electromagnetic wave in vacuum is $B_0=510 \mathrm{n}\mathrm{T}$. The amplitude of the electric field part of the wave is

The spectrum of an oil flame is an example of

If ${\nu }_g, {\nu }_X$ and ${\nu }_m$ are the wave speeds of gamma rays, $\mathrm{X}-$ rays and microwaves respectively in vacuum, then

Suppose that the electric field part of an electromagnetic wave in a vacuum is $\mathrm{E}=(3.1 \mathrm{N}/\mathrm{C})\hspace{0.17em}\cos \left[\right(1.8 \mathrm{rad}/\mathrm{m})\mathrm{y} +\hspace{0.17em}(5.4 \times {10}^6 \mathrm{rad}/\mathrm{s}\left)\mathrm{t}\right] \hat{\mathrm{i}}$ . What is the frequency?

The oscillating magnetic field in a plane electromagnetic wave is given by $B_y=8\times {10}^{-6} \sin [2\times {10}^{11}t +\hspace{0.17em}300 \pi x] \mathrm{T}$. Calculate the wavelength of the electromagnetic wave. 

If the amplitude of the magnetic field is $3\times {10}^{-6} \mathrm{T}$, then amplitude of the electric field for an electromagnetic waves is