Embibe Experts Solutions for Chapter: Electromagnetic Waves, Exercise 2: Level 2

An electromagnetic wave of frequency $5 \mathrm{GHz}$ is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are $2.$ Its velocity in this medium is $.......\times {10}^7 \mathrm{m}/\mathrm{s}$

For radiation of $9 \mathrm{GHz}$ passing through air. The number of waves passing through $1 \mathrm{m}$ length is

A light beam travelling in the $x-$direction is described by the electric field $E_{\mathrm{y}}=\left(300 \mathrm{V} {\mathrm{m}}^{-1}\right)\sin \left[\omega \left(t-\frac{x}{c}\right)\right]$. The maximum magnetic field is

An electromagnetic radiation of frequency $v$, wavelength $\lambda$ travelling with velocity $c$ in air enters a glass slab of refractive index $\mu$. The frequency, wavelength and velocity in the glass slab will be, respectively,

The wavelength of electromagnetic waves employed for space communication lie in the range of-

The sound waves after being converted into electrical waves are not transmitted as such because -

The amplitude of electric field of a plane electromagnetic wave propagating along Z-axis is $4{\mathrm{Vm}}^{-1}.$ It varies with time. The average energy density of the magnetic field in ${\mathrm{Jm}}^{-3}$ is $\left({\epsilon }_0=8.854\times {10}^{-12}{\mathrm{C}}^2 {\mathrm{N}}^{-1} {\mathrm{m}}^{-2}\right)$

Two light waves are given by, $E_1=2\sin \left(100\pi t-kx+30°\right)$ and $E_2=3\cos \left(200\pi t-k^{\text{'}}x+60°\right)$
The ratio of intensity of first wave to that of second wave is: