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A place electromagnetic wave F(s)=100 ...

A place electromagnetic wave
`F_(s)=100 cos(6xx10^(8)t+4x) V//m`
Propagates in a medium of dielectric constant. The refractive index is

A

`1.5`

B

`2.0`

C

`2.4`

D

`4.0`

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The correct Answer is:
B
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NCERT FINGERTIPS-PRACTICE PAPPER-Practice Paper 3
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