The intensity of light from a source is $\left( {\frac{{500}}{\pi }} \right)W/{m^2}$ . Find the amplitude of electric field in this wave
$\sqrt 3 \times {10^{2\,}}\,N/C$
$2\sqrt 3 \times {10^{2\,}}\,N/C$
$\frac{{\sqrt 3 }}{2} \times {10^{2\,}}\,N/C$
$2\sqrt 3 \times {10^{1\,}}\,N/C$
The ratio of contributions made by the electric field and magnetic filed components to the intensity of an electromagnetic wave is
A plane EM wave is propagating along $\mathrm{x}$ direction. It has a wavelength of $4 \mathrm{~mm}$. If electric field is in y direction with the maximum magnitude of $60 \mathrm{Vm}^{-1}$, the equation for magnetic field is:$7$
If $E$ and $B$ denote electric and magnetic fields respectively, which of the following is dimensionless
The electric field in an electromagnetic wave is given by $E =56.5 \sin \omega( t - x / c ) \;NC ^{-1}$. Find the intensity of the wave if it is propagating along $x-$axis in the free space. (Given $\left.\varepsilon_{0}=8.85 \times 10^{-12} \;C ^{2} N ^{-1} m ^{-2}\right)$
Sun light falls normally on a surface of area $36\,cm ^{2}$ and exerts an average force of $7.2 \times 10^{-9}\,N$ within a time period of $20$ minutes. Considering a case of complete absorption, the energy flux of incident light is.