Question 49: EM waves

Question

Electromagnetic waves travel in a medium with speed of $$1.5 	imes 10^8 \mathrm{~m} \mathrm{~s}^{-1}$$. The relative permeability of the medium is 2.0. The relative permittivity will be:

Accepted Answer

$$\begin{aligned}
& v=\frac{1}{\sqrt{\mu_0 \mu_r \varepsilon_0 \cdot \varepsilon_r}} \
& \Rightarrow 1.5 	imes 10^8=\frac{3 	imes 10^8}{\sqrt{2 \cdot \varepsilon_r}} \Rightarrow \varepsilon_r=2
\end{aligned}$$

Answer

4

Answer

1

Answer

2

Answer

5

EM waves

Electromagnetic waves travel in a medium with speed of $1.5 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$. The relative permeability of the medium is 2.0. The relative permittivity will be:

Choose the correct answer: