Question

At an instant in time, the electric and magnetic fields of an electromagnetic wave are given by - -6.25 x 10-3 v/m and B = -2.08 x 10-111 . Find the Poynting vector for this wave. (Express your answer in vector form.) W/m2 S =

Answer 1

Poynting vector,
`S=1.03* 10^(7)\ W/m^2`

Step-by-step explanation:

It is given that, The electric and magnetic fields of an electromagnetic wave are given by :

Electric field,
`E=6.25* 10^(-3)\ V/m`

Magnetic field,
`B=2.08* 10^(-11)\ T`

We need to find the Poynting vector for this wave. the Poynting vector is given by :

`S=(1)/(\mu_o)EB`

`S=(1)/(4\pi * 10^(-7))* 6.25* 10^(-3)* 2.08* 10^(-11)`

`S=1.03* 10^(7)\ W/m^2`

So, the Poynting vector for this wave is
`1.03* 10^(7)\ W/m^2`. Hence, this is the required solution.