Physics · JEE | Electromagnetic Waves

The speed of electromagnetic waves in a material medium of relative permittivity \( \varepsilon_r \) and relative permeability \( \mu_r \) is given by:

1. A
   \( v = \sqrt{\mu_0 \varepsilon_0} \)
2. B
   \( v = \frac{c}{\mu_r \varepsilon_r} \)
3. C
   \( v = \sqrt{\frac{\mu_r}{\varepsilon_r}} \)
4. D
   \( v = \frac{1}{\sqrt{\mu \varepsilon}} \)