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Express velocity of electromagnetic wave...

Express velocity of electromagnetic wave in a material medium in terms of `mu` and `epsi`.

A

` ( epsilon_(0) mu_(0) )^(-1//2)`

B

`( epsilon_(0) e_(r) mu_(0) mu_(r) )^(-1//2)`

C

`3 xx 10^(8)` m/s

D

`((epsilon_(0) epsilon_(r) ) /(mu_(0) mu_(r) ))^(+1//2)`

Text Solution

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The correct Answer is:
B
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