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The speed of electromagnetic wave in vac...

The speed of electromagnetic wave in vacuum

A

`v=(1)/(sqrt(mu_(r)K))`

B

`v=csqrt(mu_(r)K)`

C

`v=(c)/(sqrt(mu_(r)K))`

D

`v=(K)/(sqrt(mu_(r )C))`

Text Solution

Verified by Experts

The correct Answer is:
C
Speed of light of vacuum `c=(1)/(sqrt(mu_(0)epsilon_(0)))` and in another medium `v=(1)/(sqrt(muepsilon))`
`therefore(c)/(v) =sqrt((mu epsilon)/(mu_(0)epsilon_(0)))=sqrt(mu_(r)K)rArr v=(c )/(sqrt(mu_(r)K)).`
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DISHA PUBLICATION-ELECTROMAGNETIC WAVES-Exercise - 1 : Concept Builder (Topicwise)(Topic 1 : Electromagnetic Waves and Displacement Current)
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  12. In an electromagnetic wave, the electric and magnetising fields are 10...

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