Question

What is the electric field amplitude of an electromagnetic wave whose magnetic field amplitude is 7 mT ?

Answer 1

`\begin{equation*} 2.1*10^6\text{ V/m} \end{equation*}`

Step-by-step explanation

To find the electric field amplitude, apply the relationship between electric field and magnetic field:

`E=cB`

where c = speed of light

B = magnetic field amplitude

Therefore, the electric field amplitude is:

`\begin{gathered} E=3*10^8*7*10^(-3) \\ \\ E=2.1*10^6\text{ V/m} \end{gathered}`

That is the answer.