The ratio of the electric field (E) and the magnetic field (B) associated with a plane electromagnetic wave is equal to
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $ωk^{-1}$
The ratio of the electric field ($E$) to the magnetic field ($B$) in a plane electromagnetic wave is given by:
$\frac{E}{B} = c$
We also know that the speed of light $c$ is related to angular frequency ($\omega$) and wave number ($k$) by:
$c = \frac{\omega}{k}$
Substituting this into the first equation gives:
$\frac{E}{B} = \frac{\omega}{k}$