Let E_0 and B_0 denote the amplitude of the e | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The intensity $I$ of an electromagnetic wave is given by $I = \frac{1}{2} \varepsilon_0 E_0^2 c = \frac{1}{2} \frac{B_0^2 c}{\mu_0}$.Radiation pre

Vedclass · Accepted Answer

$\frac{1}{2} \varepsilon_0 E_0^2$

Vedclass · Answer

(A) The intensity $I$ of an electromagnetic wave is given by $I = \frac{1}{2} \varepsilon_0 E_0^2 c = \frac{1}{2} \frac{B_0^2 c}{\mu_0}$.Radiation pressure $P$ on a totally absorbing surface is defined as the momentum transferred per unit area per unit time,which is given by $P = \frac{I}{c}$.Substituting the expression for intensity,we get $P = \frac{\frac{1}{2} \varepsilon_0 E_0^2 c}{c} = \frac{1}{2} \varepsilon_0 E_0^2$.Thus,the magnitude of the average momentum transferred per unit area and per unit time is $\frac{1}{2} \varepsilon_0 E_0^2$.

Let $E_0$ and $B_0$ denote the amplitude of the electric and magnetic fields of a plane electromagnetic wave in air. The magnitude of the average momentum transferred per unit area and per unit time to a totally absorbing surface is

Similar Questions

$A$ plane electromagnetic wave is moving in free space with velocity $c = 3 \times 10^8 \ m/s$ and its electric field is given as $\vec{E} = 54 \sin(kz - \omega t) \hat{j} \ V/m$,where $\hat{j}$ is the unit vector along the $y$-axis. The magnetic field vector $\vec{B}$ of the wave is:

In a plane electromagnetic wave,which of the following has/have a zero average value in one complete cycle?
$(a)$ Magnetic field
$(b)$ Magnetic energy
$(c)$ Electric field
$(d)$ Electric energy

The velocity of an electromagnetic wave is parallel to:

The average value of electric energy density in an electromagnetic wave is:

$A$ laser beam has intensity $2.1 \times 10^{15} \ W/m^2$. The amplitude of the magnetic field in the beam is approximately: (in $T$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module