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  4. The velocity of electromagnetic radiation in a medium of permittivity ε0 and permeability μ0 is given by

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Q. The velocity of electromagnetic radiation in a medium of permittivity $\varepsilon_{0}$ and permeability $\mu_{0}$ is given by

AIIMSAIIMS 2008Electromagnetic Waves

Solution:

The velocity of electromagnetic radiation in vacuum is $\frac{1}{\sqrt{\mu_{0} \varepsilon_{0}}}$, where $\mu_{0}$ and $\varepsilon_{0}$ are the permeability and permittivity of vacuum.