Q136 / 200 · NEET 2008 (Screening) · Physics

The velocity of electromagnetic radiation in a medium of permittivity $\varepsilon_0$ and permeability $\mu_0$ is given by

  • A
    $\sqrt{\frac{\varepsilon_0}{\mu_0}}$
  • B
    $\sqrt{\mu_0 \varepsilon_0}$
  • Correct answer
    C
    $\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$
  • D
    $\sqrt{\frac{\mu_0}{\varepsilon_0}}$

Solution

Velocity of electromagnetic radiation is the velocity of light (c), ie, $$ c=\frac{1}{\sqrt{\mu_0 \varepsilon_0}} $$ where $\mu_0$ is the permeability and $\varepsilon_0$ is the permittivity of free space.

Hence, the correct answer is option: 'C'.

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