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When light propagates through a material medium of relative permittivity \epsilon _{r} and relative permeability \mathrm{\mu_{r}}, the velocity of light, \mathrm{v} is given by : (c- velocity of light in vacuum )

Option: 1

\mathrm{v=\sqrt{\frac{\mu_{r}}{\epsilon_{r}}}}


Option: 2

\mathrm{v=\sqrt{\frac{\epsilon_{r}}{\mu_{r}}}}


Option: 3

\mathrm{v=\frac{c}{\sqrt{\epsilon_{r} \mu_{r}}}}


Option: 4

\mathrm{v=c}


Answers (1)

best_answer

For light travelling in the medium of relative permeability and permittivity, \mu_{r} and \epsilon_{r} respectively the speed of light is

\mathrm{V=\frac{C}{\sqrt{\mu_{r} \varepsilon_{r}}}}

Hence the correct option is 3

Posted by

Divya Prakash Singh

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