Question

The frequency of oscillation of the electric field vector of a certain e.m. wave is $5\times {10}^{14}Hz$. What is the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong?

Answer 1

Given: The frequency of oscillation of the electric field vector of a certain e.m. wave is $5\times {10}^{4}Hz$.

To find the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong

The frequency of the electric field vector

$f=5\times {10}^{4}Hz$

The frequency of the magnetic field vector is also = $5\times {10}^{4}Hz$

And we know,

$c=\lambda f⟹\lambda =\frac{c}{f}⟹\lambda =\frac{3\times {10}^8}{5\times {10}^4}⟹\lambda =0.6\times {10}^4=6\times {10}^{3}m$

Electromagnetic waves with longer wavelengths and lower frequencies include infrared light, microwaves, and radio and television waves lie in visible region.