The electric field of a plane electromagnetic wave propagating through a non-magnetic medium is given by E = 20 cos ( 2 × 1 0 10 t − 200 x ) V/m. The dielectric constant of the medium is equal to: (Ta

Question

The electric field of a plane electromagnetic wave propagating through a non-magnetic medium is given by E = 20 cos ( 2 × 1 0 10 t − 200 x ) V/m. The dielectric constant of the medium is equal to: (Take μ r ​ = 1 )

TestHub · Accepted Answer

Speed of wave: 200 2 × 1 0 10 ​ = 1 0 8 m/s Refractive index: 1 0 8 3 × 1 0 8 ​ = 3 = ε r ​ μ r ​ ​ = ε r ​ ​ ε r ​ = 9

Physics - EM Waves Question with Solution | TestHub

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