K K Sharma Solutions for Chapter: Electromagnetic Waves, Exercise 21: Properties of EM Waves

A magnetic field in a plane electromagnetic wave is given by,
$B_y=2\times {10}^{-7}\sin \left(0.5\times {10}^{3}x+1.5\times {10}^{11}t\right) \mathrm{T}$. Which option is incorrect?

In an electromagnetic wave, the average energy density is

The magnetic field of a plane-polarized electromagnetic wave moving along $z$-direction is given by,

$B=1.2\times {10}^{-6}\sin \left[2\mathrm{\pi }\left(\frac{z}{240}-\frac{t\times {10}^7}{8}\right)\right] \mathrm{T}$. The maximum electric field is

The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along

An electromagnetic wave of frequency $v=3.0 \mathrm{MHz}$ passes from vacuum into a dielectric medium with permittivity $\epsilon =4.0$. Then 

Light is an electromagnetic wave. Its speed in vacuum is given by the expression,

Electromagnetic waves are transverse in nature and is evident by,

An electromagnetic wave going through vacuum is described by $E=E_0\sin \left(kx-𝜔t\right)$. Which of the following is independent of the wavelength?