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Q.

A plane electromagnetic wave is given by  E= 100 cos (6x108t+ 4x) V/m propagating in a dielectric medium. The refractive index of the medium is

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a

1.5

b

2

c

2.4

d

3

answer is B.

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Detailed Solution

Velocity of the work is v=ωk=6×1084=32×108μ=cv=3×108×23×108=2
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